Hello All,

We are currently building my 72 350 and will be replacing the stock 350 with a Tremec 5 speed. I have tried to find some specific instructions for doing this on the site but have only stumbled on one example.

Does anyone have a specific schematic for a 350 crank? Is the sizing the same for a 455? Any advice would be helpful so I can pass it along to my machine shop.

Thanks for any help you guys can offer. I have attached the link for the picture I found...sorry I couldn't seem to save it and post it.

https://classicoldsmobile.com/forums...ans-crank.html

 

The pilot bearing recess dimensions are the same for all 1964-1990 Olds cranks. That is the correct drawing.

 

Thanks Joe! I have heard of people using different brands of bushings...is there a favorite one out there or a certain part number to go after?

 

I found this, hopefully it's correct.


From this thread:
https://classicoldsmobile.com/forums...-question.html
crank20dimentions1.jpg

 

The OP already had that drawing in the link he cited. The question was, is an SBO crank pilot hole the same as for a BBO crank.

 

Sorry missed the link...

 

Hey guys! Thanks again for the info...any idea what the best bushing out there is to use? I've seen some conversions from Mondelo but Im guessing there is a better option...any part numbers would be great!

Ben

 

BCA7109 bearing.