I am taking a 454 from a 1989 suburban with an automatic and putting in my 1971 Camaro with a manual. I understand that I need to get an externally balanced flywheel, but do I also need to change the damper too or just put the flywheel on and go? Thanks, Kevin

no it should already have an external bal installed

Just need to change from flexplate to externally balanced flywheel.

454 BB flywheel here!!

Not a 400 SB one!!

OR buy a 454 crank flange balance plate for around $15 to $20... And then use a stock neutral balanced 350 flywheel.

pdq67

Can you use just any ext balanced flywheel, or does it have to be balanced with the rotating assembly?

Any should work. I bought mine from a member here...

A 400 SB need's a 400 SB flywheel and a 454 BB need's a 454 BB flywheel.

But you can buy cheap crank flange balance plates for both a 400 and a 454 so that you can use a neutral balance flywheel IF you want to save some money.

And both the damper and flywheel/flex plate are NOT balanced to a specific rotating assembly so that they can be used on other engines!!

pdq67