Seller notes

ARC BP383 Small Block Chevy 383/400 Zinc Plated Balance Plate2 piece rear main seal only. This plate lets you balance your externally balanced Chevy 383 or 400 engine 2 piece rear main seal only, with a neutral balance 350 manual flywheel or automatic transmission flexplate. 0.100" thick, this gets sandwiched between the crank and flexplate. Road and race tested. Allows use of lighter 350 flywheel/flexplates to rev quicker. May not work on certain flexplates and flywheels with the dished area in...

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