1970-90 Chevy 454/502 Nodular Flywheel-168 tooth ext balance OE # 3993827
Application:
1970-1990 Chevy 454/502ci V8, 2-piece rear main 3.580" crank bolt pattern OE # 3993827168 Tooth ring gear Nodular IronExternally balanced11" clutch (12-5/8" clutch pattern)