Which motor mount frame pads - Chevelle Tech
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post #1 of 12 (permalink) Old Dec 6th, 19, 3:50 PM Thread Starter
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Which motor mount frame pads

I’m looking for info from people that have put a big block in a 64 or 65. I’m restoring a 65 SS and it’s getting a 454 Mark IV engine. I’m using Doug’s headers part# D322. I’m just wondering if anybody has done this combo and if so which frame pads did you use the factory pads which are for a small block or did you put the big block pads on?
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post #2 of 12 (permalink) Old Dec 6th, 19, 11:02 PM
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Re: Which motor mount frame pads

1964-67 small block and 1965-67 big block frame brackets are dimensionally the same, the difference being a notch/relief in the BBC brackets to clear the original BBC motor mount interlocking tabs. Either bracket will work if you use something like Energy Suspension 3-1114G polyurethane mounts.
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post #3 of 12 (permalink) Old Dec 6th, 19, 11:19 PM Thread Starter
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Thanks for the excellent info David, that explains why there is no mention of having to use the big block pads in the installation instructions with the headers on 64 or 65 models. It’s also good news because the factory pads got powder coated with the rest of the frame and I shouldn’t have to change them
now.
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post #4 of 12 (permalink) Old Dec 7th, 19, 9:07 AM
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Re: Which motor mount frame pads

Yes when I put my first big block in my 1965 back in 1981 I discovered this. The passenger side had a small block pad the other side had a BBC pad for some reason. The motor had a very difficult time getting in on that side ended up bending that tab to get it in. I had no idea what was wrong. Years later when I had motor out I realized the problem and got the right pads.
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post #5 of 12 (permalink) Old Dec 7th, 19, 9:46 AM
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Re: Which motor mount frame pads

I was quite surprised to find that an all original 39K mile June 1965 (06E) Fremont, CA built 1965 Malibu SS convertible 283/PG I used to own had BB frame brackets in it. I'm sure it wasn't the only one built that way.

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post #6 of 12 (permalink) Old Dec 7th, 19, 10:54 AM Thread Starter
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Oh yes, things were so much different in the 60s than they are now on the cookie cutter everything looks the same assembly lines. It’s cool to hear things like that Dave. They probably weren’t sure how many Z-16 cars they were going to build so there are probably more out there like that, I wonder if it had the extra convertible frame supports in it too.
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post #7 of 12 (permalink) Old Dec 7th, 19, 10:55 AM Thread Starter
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Duhhh just saw that the car WAS a convertible
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post #8 of 12 (permalink) Old Dec 7th, 19, 10:57 AM Thread Starter
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Which makes me wonder, do you think it was possible that, that car was going to be a Z-16 convertible? Wow
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post #9 of 12 (permalink) Old Dec 8th, 19, 11:13 AM
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Re: Which motor mount frame pads

Quote:
Originally Posted by Dan1965 View Post
Which makes me wonder, do you think it was possible that, that car was going to be a Z-16 convertible? Wow
I believe the Pilot Z16 was a Baltimore car and all regular production ones were Kansas. No Z16's came out of the Fremont, CA plant.

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post #10 of 12 (permalink) Old Dec 8th, 19, 2:05 PM Thread Starter
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Yep that sounds right. So it was much more likely they ran out of small block pads on the line and the foreman said put the damned big block pads on they’ll work! Hahahahahaha
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post #11 of 12 (permalink) Old Dec 8th, 19, 3:54 PM
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Re: Which motor mount frame pads

Quote:
Originally Posted by Dan1965 View Post
Iím looking for info from people that have put a big block in a 64 or 65. Iím restoring a 65 SS and itís getting a 454 Mark IV engine. Iím using Dougís headers part# D322. Iím just wondering if anybody has done this combo and if so which frame pads did you use the factory pads which are for a small block or did you put the big block pads on?
I had D322 in my 64 with a 489BB.
Om using a set of repro BB pads solid Moroso mount on driver side and oem rubber on passenger side. Best ofshelf headers I have used almost perfect fit. Only small modifications to fit I had to grind some on passenger side upper a arm and passenger side rear lower a arm bracket and on driver side I had to remove the washers on the steering coupler bolts and all was perfect.

Chevelle Malibu ss 64
489 BB with parts from Lewis racing
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Th 400 Edge 9.5" converter
57 3/4Ē wide 12 bolt: Eaton posi, Us gear 3.31, Toms KA 33 splines axles
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post #12 of 12 (permalink) Old Dec 8th, 19, 9:54 PM Thread Starter
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Oh that’s great to hear SS64. Those are the reasons I figured I spend the extra$$$ on these headers, I got a really good price on a cyber Monday deal. Hopefully they will fit with minimal “adjustments”
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