Seller notes

Chevrolet 350 Cast Steel Crankshaft 3.480'' Stroke 1-Piece Rear Seal (Late Style) Internal Balance in Front, External in Rear 1870 Bobweight GM engineers redesigned the crankshafts used in production small-block V8 and V6/90° engines in 1986 to use a leak-resistant one-piece rear seal. This change from a two-piece seal to a one-piece seal required a change in the bolt pattern on the crankshaft flywheel flange. The engine block, oil pan, pan gaskets, and flywheel were also redesigned to accommod...

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