Flywheel, external or intenral balance
 

To my understanding, my fresh 454 will require and external balance flywheel. Is this true for all BBs?
Also, I know that some SB parts will fit a BB. Bell housing for one, and the starters too. Any others?
Dist., flywheel, clutch assembly, water pump, etc, etc.?

RE: Flywheel, external or intenral balance
 

dist is the same i think a sb 400 has same flyweel but check on that

RE: Flywheel, external or intenral balance
 

The externally balanced flywheel used on the 454 is 168 teeth. The SB 400 flywheel is externally balanced but it is 153 teeth. The starter for the 168 tooth application will fit. If you order a starter for a 69 Corvette small block or big block, it will work. All 69's had the 168 tooth flywheel. Nothing else is interchangable between the SB and BB. The block will bolt up to the bellhousing. Ensure that you have a bellhousing that accomodates the 168 tooth flywheel. The flywheel will not fit into the other one. I don't have the casting numbers handy. Hope this helps a little.

RE: Flywheel, external or internal balance
 

O. K.
The 454 takes an external balance flywheel, 168 tooth. Now, if the '69 came with this setup on all, how about the bell housing? It should interchange too, right? How would I look up the correct casting number? Point me in the right direction, and I'll look it up.
Thanks

RE: Flywheel, external or intenral balance
 

The GM part numbers for the bell housing you need are 3958403 or 3899621. The bolt pattern for the block and trans are the same for big and small block engines.

RE: Flywheel, external or intenral balance
 

Thank you![sm=icon_rock.gif]

RE: Flywheel, external or intenral balance
 

Anytime. Have a great holiday season.

RE: Flywheel, external or intenral balance
 

It is my understanding that all 427 engines were internally balanced and 454's are externally balanced. I have a 454 block in my 69 Vette, but it is internally balanced. I think at sometime before I became the owner the 427 parts were installed in the 454 block. I have been told the 454 is a stronger built block than the 427.

RE: Flywheel, external or intenral balance
 

I have been told that the only dif between the 454 and 427 is the bore and stroke.

RE: Flywheel, external or intenral balance
 

Here is the scoup:
All original big block engines are internally balanced except the 454's and 502's.

Source: HPBooks "Big-Block Chevy Performance" and "How to Rebuild Big-Block Chevy Engines".