Ok he is my tail of woe !!! I brought a 67 chevelle in pieces (mistake 1) It came with a 454, the car was an originally a small block car, Since they did not install 307 CID in 67 I assumed I would not have a problem installing this big block using small block engine mounts. Of course I did not test fit the mounts (mistake 2) so when I attempted to drop this engine in Guess what NO GO the engine mount would not slip down on the frame mount.. UGH ... :mad: all this after I found the bell housing I have will not fit over the 11 inch flywheel and clutch I installed :mad: Over all this was a bad chevelle day and I needed to vent thanks for listening... So should I bite the bullet and by BB frame and motor mounts or just try another set of SB motor mounts and test fit 1st ?????? graemlins/angry.gif

I'm not sure but I think small block motor mounts are different than big block.

I think that I'd try a different set of smallblock motor mounts first.

Tom,
I don't know if you have resolved the flywheel/bell housing issue yet, but, as you obviously have discovered, there is a difference. The 14in, 168 tooth flywheel (which you call an 11in flywheel) requires the "big" bell housing. The most commonly available housing is the "621" (3899621) housing. Those housings are becoming a little difficult to locate these days, but there are lots of them out there. In the past, I have picked them up at swap meets for $25-50. Just shop around, one will turn up.
Since you mentioned this issue, do you have a starter yet? If not, you MUST use a starter with a staggered bolt pattern and a CAST IRON NOSE. The starter with a staggered bolt pattern and an alum nose WILL NOT fit into the starter bulge of the 621 housing.
I am quite knowledgeable on the 68-72 pecularities, but a little less so on 64-67. But I do understand that for 67-earlier, the SB and BB mounts are different.

Oh, one more thing Tom. Just take a break, have a beer (or 3), calm down and go back to it another day. TRUST ME, EVERY ONE OF US HAVE GONE THROUGH SIMILAR DIFFICULTIES. I know it can be frustrating and that you can get discouraged, but just hang in there, it'll all come together in due time.

Originally posted by DZAUTO:
Oh, one more thing Tom. Just take a break, have a beer (or 3), calm down and go back to it another day. TRUST ME, EVERY ONE OF US HAVE GONE THROUGH SIMILAR DIFFICULTIES. Amen. Another thing you want to be sure of is that your oilpan will fit in the Chevelle. I made the mistake of getting an LS7 pan and windage tray, only to find out it wouldn't clear the crossmember. Of course, I found out when I was trying to put the engine back in!
Just part of the fun!
John

If you have motor mounts with the safty lock they will not fit small block stands you need big block stands or the cheep motor mounts without the locks

Yep! Small block mounts are different then big block mounts so you will need to change those. You can find a new set on ebay for about 50.00. You might have a oil pan issue too. I am doing a 502 in my 66 Chevelle and have been told by several people that you need to switch the pans to make the motr fit right. Good luck on the project. When in doubt, sleep on the problem and a resolution usually will come the next day.. Good Luck..

Here is a photo of the starter Tom was refering to.
http://users.triconet.org/philipv/iron%20nose.jpg

SB and BB frame mounts are the same height. Only BB mounts have a reinforcement ridge. Make sure they did not switch the mounts to the taller 307 mounts which will not fit. If your frame mounts are original I would just buy Energy suspension engine mounts.

To when we did our 65 it had the original 283 framestands, we used solid Morosso steel mounts and never looked back it fit like a glove. Also it you don't have a Chevelle pan you will have to get one,on the 65 we ordered one from Year One. On my 66 the 396 was long gone and I had a local speedshop build a 454 I had out of a truck,I knew the pan would not fit so the shop owner let me look through his collection of pans off his core engines. The pan I found was perfect with two steps,it cleared the frame perfectly. graemlins/hurray.gif

Thanks guys, I was back at it today, just a different part of the project. I appreciate the heads up on the starter that would have been next problem but that seems solved.. graemlins/thumbsup.gif I never even thought about the oil pan or even looked at it.. I did purchase one for a 67 396 right from GM so I would guess it should clear but I will double-check it Monday. I am going to pull the frame and engine mounts to see where the problem lies.. I’ll be sure to let everyone know when I solve the puzzle. Thanks for the support
Tom graemlins/waving.gif

i also have a 66 that had a six in it and installed a 454 with the solid mounts also. then wrecked that car and bought a 283 car and installed the motor in it. maybe your frame mounts just aren't in the right spot on the frame. try taking the frame mounts off the frame and bolt them to the motor mounts. set motor back in and see what holes line up.

I had a similar problem when I put the 454 in my '67. turns out the headers were being pinched against the bellhousing, so I cut a notch out of each side on the bellhousing and everything slid in nicely....I think the 307 mounts are the only ones that are different in the '67??? I could be wrong, but I think the SB and BB used the same mounts.

I think the 307 mounts are the only ones that are different in the '67??? The 307 was NOT available in 1967... Didn't come out until 1968...

The 66/67 SB and BB mounts are different, BUT they have the same height, etc... Just the clearance for the reinforcement ridge...

Use 1966/1967 SB engine mounts (bolted to your 454) and it will bolt right up to the SB frame mounts... Correct location...

I havent pulled it apart yet but I did buy small block engine mounts to fit on the frame mounts no good they appear to be to narrow, I am running stock exhaust manifolds I have the right oil pan on the vehicle nothing is hitting. so I am guessing the mounts I purchased from the local part store are no good and causing the problem I am having, I wont be able to pull it apart until The weekend, I'll be sure post the findings keep the suggestions coming THANKS ALOT

Tom graemlins/thumbsup.gif

What is the part # on the rubber mounts you bought? The most common aftermarket part #s are 2267 or 2142 (or something ending in 2267 or 2142). The opening that goes over the steel part on the frame should be 2 5/8" wide. If it's narrower (part # 2283 is only 2 1/4" wide) take them back and exchange them. But sometimes even a correct rubber mount will need to be "massaged" (read big hammer)to fit on the stand. Seems the China junk isn't always exactly right to begin with, or you may have gotten some that were on the bottom with 10,000 other mounts in the shipping container on top of them.

If they are too narrow, they are for a later 307 Chevelle and not a 64-67 variety. You need the correct parts like dyno jonn said!

Well I pulled the mounts off the engine it appears that the parts store gave me the wrong ones, not only is to thin but it has the t bar also causing it not to fit properly.
So to the part store I go with frame mounts in hand, Thanks again for all you help

HTM there is a differt motor mount for the frame beteen a big and small block. the big block is pushed ahead somewhat where the small stand come sraight up.

Problem solved ….. I ordered another set of small block motor mounts, they slid right on the frame mount like a hot knife through butter.. So for all the people that ask the question.. will a big block fit on small block frame mounts .. YES it will as long as not a 307 frame mount… life is good again… back at it Saturday Thanks for everyone’s help and support… this case is close.. graemlins/thumbsup.gif

I just came in from the garage wher I was installing my recently built 427 in my 69 SS396. It has been a nightmare getting new mounts to fit. The old (original) ones were pretty worn, so it had to be done. I went through 4 sets of jobber mounts that would not fit, before I found a set of GM mounts. I barely got the GMs to fit. The only reason I could see for my problem was that the rubbers on the old mounts were compressed, and the new ones were not, therefore they were slightly thicker. I put them in a vise for a few minutes to compress the rubber, and then managed to install them. Worst job I have ever had to do on my 69.

On a 64-67 the frame mounts are the same for a 283 and a 396, same GM p/n. Also a bigblock will fit on the 307 if you use the 307 engine mounts. If you use the 350-454 mounts the motor sits too high, but I've seen people do it.... The 307 uses the older non-safety style mount.

David