1975 Monte Carlo

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Post by 77mali on Mon May 20, 2013 5:51 pm

1973 454 MONTE wrote: Wink love those wheels Wink

i will get a pic of mine,but i think ours does not look like swiss cheese.

a 350 drops right into my 454 mounts.

This is how you make Swiss cheese Jacking (but I'm sure you knew that)
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Post by Fishgrinder on Tue May 21, 2013 12:56 am

I'm thinking about these brackets, not the frame mounts:



1975 Monte Carlo - Page 9 Eng_motor_mount_brkts

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Post by 77mali on Tue May 21, 2013 6:30 am

1975 Monte Carlo - Page 9 P1050010

1975 Monte Carlo - Page 9 P1050011
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Post by Fishgrinder on Tue May 21, 2013 6:36 am

Indeed! You know if small block brackets can be put on a big block?

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Post by 77mali on Tue May 21, 2013 7:00 am

I'm not 100% certain that they can. I can measure & we can compare to what Chris has or maybe he already knows the answer for sure. I'll post my measurements later today if you still need them.
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Post by Fishgrinder on Tue May 21, 2013 1:56 pm

Thanks for the offer Mali!

From what I read here: http://www.nastyz28.com/2gcog/motmount.html I assume small block brackets will work.

The ones I bought yesterday measure 2 5/8", so apparently they are not from a truck according to that site.

Chris: is it possible for you the measure the distance in your brackets?
http://www.nastyz28.com/2gcog/tech/clam-tape.jpg


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Post by 1973 454 MONTE on Tue May 21, 2013 2:11 pm

my 454 clams are 2 3/8.

if memory serves me right,when i put the 350 in my car i tried the 454 clams,but it would not fit.

so YES clams are different it looks like.
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Post by Fishgrinder on Tue May 21, 2013 2:29 pm

1973 454 MONTE wrote:my 454 clams are 2 3/8.

if memory serves me right,when i put the 350 in my car i tried the 454 clams,but it would not fit.

so YES clams are different it looks like.

So it's the bolt pattern against the block which is different, or the shape as well?

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Post by 77mali on Tue May 21, 2013 2:52 pm

Do you still need measurements? Mike look like the ones you posted from the Camaro site. Let me know.
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Post by 1973 454 MONTE on Tue May 21, 2013 2:55 pm

block is the same, shape is close.

bb on left
1975 Monte Carlo - Page 9 Bbsb10

bb closest
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Post by Fishgrinder on Tue May 21, 2013 2:59 pm

Man, hard to see the difference for an untrained eye. Thanks Chris!

Mali: you don't have to bother, seems like I have to find some big block brackets now.

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Post by 1973 454 MONTE on Tue May 21, 2013 3:21 pm

Fishgrinder wrote:Man, hard to see the difference for an untrained eye. Thanks Chris!

Mali: you don't have to bother, seems like I have to find some big block brackets now.


http://www.ebay.com/itm/GM-454-CHEVY-ENGINE-MOTOR-MOUNTS-A-B-1973-90-11467-11609-/190769347388#ht_3007wt_806
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Post by Fishgrinder on Tue May 21, 2013 4:37 pm

1973 454 MONTE wrote:
Fishgrinder wrote:Man, hard to see the difference for an untrained eye. Thanks Chris!

Mali: you don't have to bother, seems like I have to find some big block brackets now.


http://www.ebay.com/itm/GM-454-CHEVY-ENGINE-MOTOR-MOUNTS-A-B-1973-90-11467-11609-/190769347388#ht_3007wt_806

Done!

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Post by 77mali on Tue May 21, 2013 9:01 pm

Glad it worked out. When are we going to see the new motor Very Happy
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Post by Bruisr on Wed May 22, 2013 1:07 am

I never knew there was a difference in the mounts! I was able to use my 350 mounts on my 454. Had no problems. Until I read this, I assumed they were the same. Funny thing is I now have a set that came with the 454 I just rebuilt, and I can't tell the difference!
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Post by Fishgrinder on Wed May 22, 2013 1:13 am

Since the 454 mounts only measure 2 3/8" from the bottom to hole centerline I assume the engine will sit lower in the bay compared to small block mounts. But if there is enough room under the hood, maybe it wont be an issue.

If I get the brackets by next weeked we'll lift the engine in Mali!

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Post by 1973 454 MONTE on Wed May 22, 2013 11:38 am

77mali wrote:
This is how you make Swiss cheese Jacking (but I'm sure you knew that)

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Post by Fishgrinder on Thu May 30, 2013 3:17 pm

Does anyone know what size the bolts for the frame mounts are? Do they need to be high grade?

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Post by 1973 454 MONTE on Thu May 30, 2013 3:32 pm

heads are 5/8 nuts are 11/16.

my guess yes and 1/2.
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Post by Fishgrinder on Thu May 30, 2013 4:19 pm

Thanks chris, but do you refer to the bolts that go through the mounts, or the three that clamp the mount to the frame? I was thinking about the latter.

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Post by 1973 454 MONTE on Thu May 30, 2013 4:40 pm

THROUGH THE MOUNTS.
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Post by Fishgrinder on Thu May 30, 2013 5:14 pm

All right, but do you also know the size of the mount to frame bolts?

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Post by 77mali on Thu May 30, 2013 7:19 pm

Here's a pic- I'll measure the length/diameter once I can find my calipers. The heads for the nut & bolt are 9/16". They way mine mounts to frame there are 3 bolt/nut assemblies used. But you may require 4 sets per side for the big block, not sure.

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Post by Fishgrinder on Fri May 31, 2013 1:21 am

Great mali! I think there will be three on each for the big block as well.

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Post by Fishgrinder on Fri May 31, 2013 3:25 pm

Picked up the mounts today:
http://www.ebay.com/itm/GM-454-CHEVY-ENGINE-MOTOR-MOUNTS-A-B-1973-90-11467-11609-/190769347388#ht_3007wt_806

However, they don't measure 2 3/8" from the bottom to the hole centerline like yours Chris. They are just under 2 7/8". Truck mounts?

Can this 4/8" difference really cause a problem? I doubt it. Hoping to get the engine in during the weekend.

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