1972 Frame motor mounts 350 engine - Chevelle Tech
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post #1 of 19 (permalink) Old Jan 9th, 20, 12:27 PM Thread Starter
 
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1972 Frame motor mounts 350 engine

Hi to all.

When I bougth my 1972 Chevelle, the previous owner bolted/welded some clam style (1975 and older?) frame engine mounts on the crossmember. I just want to make sure that the ones I'm ordering are the right ones for a GM 350. Also, I will be using the poly ones for engine mounts. Everything is supposed to fit together?

Thanks for the help!
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post #2 of 19 (permalink) Old Jan 9th, 20, 1:18 PM
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Re: 1972 Frame motor mounts 350 engine

You've got the right style frame mounts pictured. HOWEVER, make sure you get the right size. If you're using a 250 or 307 engine, they came with a pair that is taller than those used for the larger displacement small blocks and all big blocks. They look identical from a distance.

Next to each other, if I recall correctly, there's about a 1/2" difference in height.

The energy suspension motor mounts work well.
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post #3 of 19 (permalink) Old Jan 9th, 20, 2:16 PM Thread Starter
 
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Re: 1972 Frame motor mounts 350 engine

Thanks for your reply. I'll make sure to order the good ones.

Thanks!

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post #4 of 19 (permalink) Old Jan 9th, 20, 2:38 PM Thread Starter
 
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Re: 1972 Frame motor mounts 350 engine

Will those be the correct ones?

It's listed for both BBC and SBC but in the application, it also lists " 5.0L/307"... I think they are the correct ones but...

https://www.summitracing.com/int/parts/amd-w-995

Thanks,

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post #5 of 19 (permalink) Old Jan 10th, 20, 10:03 PM
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Tim
 
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Re: 1972 Frame motor mounts 350 engine

If I can add a question to this thread, my 71 Chevelle currently has a 350, I just bought a 454. Do the engine mounts on the frame need to be changed?
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post #6 of 19 (permalink) Old Jan 10th, 20, 10:34 PM
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Re: 1972 Frame motor mounts 350 engine

Here's a page showing the difference, scroll down: https://www.chevellestuff.net/tech/engine_mounts.htm

A lot of folks sell these. Here's one like you need (at bottom): East Coast Chevelle | Chevelle Restoration Car Parts

327, 350, 396, 402, 427, 454, etc.: all the same frame mounts.
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post #7 of 19 (permalink) Old Jan 10th, 20, 11:19 PM
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Re: 1972 Frame motor mounts 350 engine

Quote:
Originally Posted by Tim's_2nd_Chevelle View Post
If I can add a question to this thread, my 71 Chevelle currently has a 350, I just bought a 454. Do the engine mounts on the frame need to be changed?
In a word No.

Quote of the day.
'The difference between trash pick up and a yard sale is the distance the stuff sits from the curb".
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post #8 of 19 (permalink) Old Jan 15th, 20, 2:20 PM Thread Starter
 
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Re: 1972 Frame motor mounts 350 engine

Soooo.... I just received my frame motor mounts from Summit (https://www.summitracing.com/int/parts/amd-w-995) and I have a little problem. It looks like I have 2 left mounts OR maybe 307 mounts? The 2 mounts have 5 bolts to bolt them on the cross member and the holes for the long connecting bolt are round (based on what I've seen so far, one should be oblong?)

The measurement from the base of the mount to the round hole is 1 inch. They are 1.5 inch tall and 2.5 inches wide at the base.

Can anyone confirm if they are the correct 350/BB mounts?

Is it OK if I have 2 lefts (or Rights) mounts
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post #9 of 19 (permalink) Old Jan 15th, 20, 6:40 PM
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Greg.
 
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Re: 1972 Frame motor mounts 350 engine

Not sure as I have a 67 Chevelle
but there should be a Left one and a Right one as in Summits Pic
and as indicated in this below pic



if you are trying to line up the Holes in the Mounts with the Frame Holes

see Related Parts at the Bottom of this page also
https://www.ss396.com/chevelle/ACE-9794.html

67 Chevelle Malibu SS Cdn
Born 283 / PG / A51
468/TH400 2,500 stall/ S60 3.70 Gs
Prev Best on M/T ET S/S #3454 street Tires/Dress 2018/05/20
60' = 1.664
1/8 = 7.532 et / 91 mph
1/4 = 11.814 et / 115 mph
NEW Best with 3,500+ Stall TC 2019/09/08
60' = 1.547
1/8 = 7.311 et / 91.76 mph
1/4 = 11.595 et / 114.28 mph


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Last edited by Kirk's67SS; Jan 15th, 20 at 6:56 PM.
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post #10 of 19 (permalink) Old Jan 15th, 20, 7:50 PM
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Re: 1972 Frame motor mounts 350 engine

see Kirks pic. the tall frame mount is usually referred as the 307 frame stand. the shorter one is for all other V-8s. AFAIK nobody has ever discovered why the 307 mounts were taller/narrower than all the others. The 307 block is not different in that area. I'd leave in the ones you've got. the clamshell mounts are superior in every way to old style. Plus there's an unpleasant surprise waiting fr you. With the lower control are installed it's very difficult to get at the nuts on the bolts that hold the mount stand in place. Many guys have resorted to cutting the heads off the bolts.

In the second pic in post #8, the long tabs with the bolt holes hang over the front of the crossmember. Yes it seems kinda weird but that's the way they were.

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post #11 of 19 (permalink) Old Jan 15th, 20, 7:53 PM
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Jonathan
 
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Re: 1972 Frame motor mounts 350 engine

FYI... The 307 mounts on the engine will fit on a 350.

Two 72 Chevelle Malibus, both 350 2bbls one Placer Gold, one Midnight Bronze

Other cars:
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post #12 of 19 (permalink) Old Jan 15th, 20, 7:57 PM
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Re: 1972 Frame motor mounts 350 engine

here's another pic

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post #13 of 19 (permalink) Old Jan 15th, 20, 7:58 PM
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Re: 1972 Frame motor mounts 350 engine

won't attach the pic, I've posted it numerous times before. Dang

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post #14 of 19 (permalink) Old Jan 15th, 20, 8:06 PM
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Re: 1972 Frame motor mounts 350 engine

try again
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post #15 of 19 (permalink) Old Jan 15th, 20, 8:12 PM
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Re: 1972 Frame motor mounts 350 engine

Ratty, be aware that the people on a vendors order desk are unlikely to know about this. They'll probably one listing that covers all. No sense confusing them with facts, just try another. Hinshaws in NC is usually good.
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