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67 chevelle BB motor mount help?

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Jason 67 conv

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Discussion starter · #1 ·
Ok I bought a set of BB frame mounts and motor mounts for the 67 chevelle I am doing last year off e-bay. I questioned the seller when I tried to put the 2 together and the holes didn't line up. The seller said he sells a lot of them and the weight of the motor will help the holes line up. Well that is a bunch of BS because with the motor in place this is what I ended up with. I think I have the correct frame mounts but the wrong motor mount's Did anyone ever run into this problem and what did you do to resolve it.

Jason

Driver side
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Passenger side

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#2 ·
Small block and big block frame mounts are different but it looks like you have the big block frame mounts.

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I take it the passenger side fits fine but the driver side won't drop onto the frame mount?

Can you jack up the driver side and brace the engine so it won't drop then remove the engine mount and see if it will physically drop over the frame mount? In other words is there a physical reason the engine mount won't fit on the frame mount such as an obstruction in the molded rubber not allowing the engine mount to drop or maybe the 'ears' on the engine mount are not wide enough? Could just be a mfg flaw.
 
#3 ·
I just finished a installing a 396 from a 350 in a 67. The frame mounts (stands as some people call them) may be different from small block to big block but I used the same ones. I bought new polyurethane engine mounts and it lines up fine. Its possible the frame mounts were already big block mounts when the 350 was in there
 
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Discussion starter · #4 ·
Thank's for the reply, if you look closely at the passengerside hole the front hole is lined up but the back hole is off by 1/4 of an inch. The drivers side isn't even close. I even tried to remove the rubber from inside of the motor mount(no luck). I am almost positive I have the correct frame mounts they look like the ones that were posted. I ran into this same problem a couple years ago with a 68 L78 Nova. Aftermarket motor mounts wouldn't fit over the stock frame mount's. I ended up buying gm motor mounts which solved the problem. I am going to look into it today.

Jason
 
#5 ·
Jason there is a little play in the stand to frame attachment area as some of the holes are oblong, talk about a pain its getting to those bolts with the engine installed. Also you may want to un hook the transmission mount to allow some more adjustment if you have it installed. I opted for the black poly mounts as I could not find a good original style mount with the nuts welded to the mount as my original are....I left all mount bolts slightly loose till it was all installed then tightened. Good Luck
 
Discussion starter · #6 ·
Does anyone know if all three motor frame mount holes are slotted on the passenger side of an original bb frame? My car was a small block car and only the top 2 are slotted. If the bottom hole is suposed to be slotted this may solve my problem.

Jason
 
#7 ·
Jason I want to say only the 2 holes on the frame are slotted as you say....When I get home I can go thru my pictures to verify if need be.....I believe the frames are identical and not engine specific....Only the stands and mounts changed. You may find the movement you need in the transmission cross member and mount.
 
#9 ·
Jason you maybe correct then, in that your motor mounts are incorrect as the stands appear correct (if repop could junk as well). I would say about 90% of the parts I've bought for my car have had some sort of issue. As I mentioned earlier I went to the black poly mounts and mine dropped right in.....At first I wanted the plain style but after looking them at the parts store I decided against it.... those things looked terrible. Today I just unboxed some stuff to find out the new rubber flex brake line to the rear that came in my 67 kit is for a 64-65 Chevelle....Don't you just love it.
 
#10 ·
there are two different widths for motor mounts. I think one early and one late style. You may be "mixing apples and oranges". I used the new energy suspension motor mounts on my 67ss 396 recently. there may be a very slight bit more vibration but they seem to work better than the old rubber jobs at deflecting the bb torque....
 
#12 ·
the heckler said:
there are two different widths for motor mounts. I think one early and one late style. You may be "mixing apples and oranges". I used the new energy suspension motor mounts on my 67ss 396 recently. there may be a very slight bit more vibration but they seem to work better than the old rubber jobs at deflecting the bb torque....
Click to expand...
There are different engine mounts and the width is measureably different. The narrower engine mounts (industry number 2283 I think) won't even begin to fit over the frame mount.

I'm wondering since the transmission isn't installed if it's just the angle of the engine on the hoist causing the problem? I know if the transmission is attached it shouldn't be cinched down but having the transmission resting on the rear mount should give the package the correct front-to-back angle. Just tossing out ideas here.
 
Discussion starter · #13 ·
Success the motor and transmission are installed! I made the lower hole on the passenger side frame about a ¼ of an inch lower so all three holes were slotted and the motor mount bolt’s went in with no problem. I guess original BB car's had all three holes slotted from what I was told?

Ok now onto the next problem I have. The stock cross member don’t line up with the turbo 400 transmission mount. I am sure someone put a turbo 400 in a 66-67 chevelle before? What my father and I are thinking of doing is moving the mounting tab for the transmission mount to the backside of the cross member. I will take some pictures when we finish it. Anyone one have any idea’s?

Second problem but I think I know the answer. My car was a power steering car and I thought I would be able to use a Saginaw pump set up but it hit’s the steering box. On 67 BB cars what does the power steering set up look like anyone have any pictures to share with me? Wasn’t the reservoir on the driver’s side inner fender?

Jason
 
#14 ·
Jason 67 conv said:
Success the motor and transmission are installed! I made the lower hole on the passenger side frame about a ¼ of an inch lower so all three holes were slotted and the motor mount bolt’s went in with no problem. I guess original BB car's had all three holes slotted from what I was told?
Click to expand...
Glad it worked out for you! :thumbsup:

Jason 67 conv said:
Ok now onto the next problem I have. The stock cross member don’t line up with the turbo 400 transmission mount. I am sure someone put a turbo 400 in a 66-67 chevelle before? What my father and I are thinking of doing is moving the mounting tab for the transmission mount to the backside of the cross member. I will take some pictures when we finish it. Anyone one have any idea’s?
Click to expand...
Sorry I can't help here. I thought I read that crossmembers for the TH400 were different than the P/G or 4 Speed cars. Don't take that as gospel, I could be completely off-base.

Jason 67 conv said:
Second problem but I think I know the answer. My car was a power steering car and I thought I would be able to use a Saginaw pump set up but it hit’s the steering box. On 67 BB cars what does the power steering set up look like anyone have any pictures to share with me? Wasn’t the reservoir on the driver’s side inner fender?
Click to expand...
Yes, the reservoir should be on the drivers fender.

For photos, check out this thread...

http://www.chevelles.com/forums/showthread.php?t=246068

& this one...

http://www.chevelles.com/forums/showthread.php?t=233403
 
#15 ·
Original Big block frame stand holes were only elongated on the upper 2 holes in the frame passenger side only...Most likely a problem with the re-pop stands. Pic posted in my showroom.

The cross members are identical an only the frame mount to cross member tab was extended for the turbo 400....On a hard top you just move it back to the pre drilled holes in the frame.....Verts an Elky's are different due to the boxed frame

And yes the 67 Big Block set up had a remote reservoir was mounted to the radiator support and drivers side fender. There is a very good chance I have pic's of the power steering set up.....I'll check tomorrow as the are on an external drive I have at work.

I just read the post above and it has a good link to some pictures.....Only thing I noted was the upper alternator mount tab is on the wrong side of the bracket.....the tab on the alt. should be on the front side of the bracket with bolt coming in from the rear.
 
#17 ·
Jason 67 conv said:
Ok now onto the next problem I have. The stock cross member don’t line up with the turbo 400 transmission mount. I am sure someone put a turbo 400 in a 66-67 chevelle before? What my father and I are thinking of doing is moving the mounting tab for the transmission mount to the backside of the cross member. I will take some pictures when we finish it. Anyone one have any idea’s?
Jason
Click to expand...
I'll expand on this one a bit more. The 66 model year didn't have provisions for the TH400 since it wasn't offered; crossmember mounting brackets could be welded to the frame however and make it work.

As noted for 1967, the El Camino and Convertible required the rear-most mounting brackets to be welded at the assembly line to fit the TH400, coupes already had the extra mounting holes. The AIM does not show the measurements on this bracket but you should be able to find a SS396 or even Malibu coupe and get a template of all the hole locations.

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FWIW, the factory AIM shows two crossmembers:
3838040 - all except convertible and pickup
3838043 - convertible and pickup

My parts book (circa 1972) shows the following crossmembers:
3949151 ~ 64-71 Chevelle (exc. Conv., El Camino) [TH400/PG]
3838043 ~ 64-67 Chevelle (Conv., El Camino) [TH400/PG/3-SPD/4-SPD]
6272136 ~ 64-67 Chevelle (exc. Conv., El Camino) [3-SPD/4-SPD]

Might note too that the driveshaft assemblies (w/yoke & u-joints) carry different part numbers between manual, Powerglide, and TH400. Whether that's due to the inclusion of the front yoke & u-joints I'm not sure. I know a factory TH400 also uses straps with two bolts instead of u-bolts and nuts to fasten to the rear end - which requires a different front yoke on the rear end. It may be that any correct length driveshaft will work with the correct TH400 front yoke and the more common u-bolts and nuts.

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