Big block tranny/ small block tranny?

[Thumper]

Im pretty sure I know the answer, but want to be sure.
I have a smallblock in front of my 465... I may have a line on a 454... it will bolt in right? Do I need motor mounts? Any differences in clutch flywheel etc?
Thanks.
Mike

 

[cybrfire]

no need. Bolt it in and go.

 

[big pappa b]

tranny will work fine. Pretty sure you can use the same motor mounts too but they do make some just for a BB. I believe the difference in in the height the motor sits..not sure. I have small black mounts on my 454 and it sits a little high. I need a little body lift for my valve cover to clear the brake booster

 

[big83chevy4x4]

the fly wheel is different. you will need one for an externally balanced 454 /forums/images/graemlins/waytogo.gif

 

[big pappa b]

Yeah..that too /forums/images/graemlins/tongue.gif

 

[big83chevy4x4]

i think the difference in motor mounts is the bolt pattern where it bolts to the crossmember.

 

[HarryH3]

The only difference might be in the diameter of the clutch that was used from the factory. Some were smaller than others. With a big block twisting on it, I would swap the clutch and pressure plate to the largest size that will fit in the bell housing. /forums/images/graemlins/eek.gif Unless you find that you already have the big 'un. /forums/images/graemlins/cool.gif Either one will fit, but the larger diameter clutch has more holding power...