Flywheel Internally or Externally Balanced?

[BlueTPI]

I have a 350TPI motor out of a 88 Formula, I'm looking for a lightweight flywheel do I need a int. or ext???

Thanks in advance.

[Jeremy]

You need one that is designed specifically for a 1-piece rear main seal. 87+ small blocks will have a balance weight on the flywheel/flexplate.

[BlueTPI]

The Flywheel will come with the balance weight, so I just install and it's done? or does it need to be balanced after it's installed?

Thanks again,
Brian

[diamondstealth]

Chevy small blocks (except 400) are internally balanced. You should be able to just buy your flexplate/flywheel (168 tooth) and run with no problems.