Motor mounts ....

[Olof Johannesson]

Hi from Sweden ! I am in the process to put in my 409 engine im my Chevy -64 ,
now I wonder can I use the small block mounts ? Best Regards Olof ,

 

[wristpin]

Welcome Olof. Sounds like its going to be a great project. Theres a few members here who have done that exact swap. Im sure they will be here sooner or later and will be a wealth of information. Post pictures of your project!!

 

[cruzin]

Yes, its the same.

 

[427John]

I thought there was a slight difference in height between the 58-64 small block and big block mounts is it not enough to cause issues?

 

[cruzin]

I thought there was a slight difference in height between the 58-64 small block and big block mounts is it not enough to cause issues?

No, its the 6 cylinder framemounts that are higher and more towards the front.

 

[427John]

I was talking about the insulators that bolt to the block not the perches that mount to the frame,I've seen reference to minor differences in height but evidently its not enough to cause problems.

 

[cruzin]

I was talking about the insulators that bolt to the block not the perches that mount to the frame,I've seen reference to minor differences in height but evidently its not enough to cause problems.

They are the same.

 

[boxerdog]

They are the same.

No they are not.

 

[Phil Reed]

There are V8 motor mounts and 6-cylinder motor mounts. You will have to use the correct mounts.

 

[427John]

We had already established that we were talking about v8 mounts and not 6 cyl.,I was under the impression that there were 2 different height v8 mounts,but apparently if there is any difference it is so small that it doesn't matter.I thought I had seen posts where people had oil pan to crossmember clearance issues,and there was speculation on whether it was due to sagging insulators or the wrong insulators.

 

[boxerdog]

This is from a post I did a while back...the 409 mount (insulator) is taller. Using an SBC mount can result in pan and exhaust manifold clearance issues.

Here is some info:

Anchor motor mounts
409 engine 2285
SBC engine 2267

GM trans mounts
2143,
2378,
2268,
Energy Suspension:
1108 = 1.937"
1142 = 1.537"
1158 = 1.437

Prothane = 1.770"

 

[61BUBBLE348]

as Dave says

 

[pvs409]

The engine mounts bolted to the frame on "all factory 6 cylinder cars" are about 1 inch taller than v-8 motor mounts bolted to the frame.
If you use the 6 cylinder mounts on the frame for a v-8 engine you are asking for problems.....

Also factory style 409 engine mounts (Anchor mounts) for the engine block are way different in construction and are stronger in my opinion.
Dave's notes above show the mounts.
Paul

 

[Olof Johannesson]

Hi alll , thanks for answer , now I know , yes , pictures will come :-)

 

[427John]

This is from a post I did a while back...the 409 mount (insulator) is taller. Using an SBC mount can result in pan and exhaust manifold clearance issues.

Here is some info:

Anchor motor mounts
409 engine 2285
SBC engine 2267

GM trans mounts
2143,
2378,
2268,
Energy Suspension:
1108 = 1.937"
1142 = 1.537"
1158 = 1.437

Prothane = 1.770"

Thats the thread I was remembering.

 

[61BUBBLE348]

When using the small block mounts , I have made shims between the block and the engine mount to get that extra clearance.