350 Cast Crank One Piece Seal. Competitively prices for stock or mildly built engines Im guessing the years at mid eighties up.
How To Remove And Replace An Automotive Engine Rear Main Seal from www.2carpros.com Chevy flywheel flex plate old style crank, two piece rear seal, 2.487 od pilot on back of crank: Every crankshaft is 100 percent inspected for critical dimensions, andread more Make sure your crank will work in the block you have. Do to the irregularities in block and oil pans this adapter is not designed to use the original style rubber rear oil pan seal. The 2 piece crank carries a small notch on the rear flange , while the one piece seal engines place that compensation on the flex plate or flywheel because the flange is smaller and needs to be round.
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This information has been gathered from several sources and has not been verified. Very high compression race engines special 139 tooth, extra heavy duty, fits standard 168 tooth size These make great race engines if you can find one As far as nitriding goes most of the truck 350 steel shafts i have seen. For stock or mildly built engines. The 2 piece crank carries a small notch on the rear flange , while the one piece seal engines place that compensation on the flex plate or flywheel because the flange is smaller and needs to be round.
