Chrysler sold these cranks under P/N P5249208 and superceeding P/Ns,they were supplied from various crank manufactures.They were forged and could be bought unfinished,both in raw forging or unbalance.P/N P5249164 was raw forged to be machine from 3.75 to 4.15 or smaller for oval track use.P5249503 was machined but unbalanced for aluminium or steel rod applications.Chrysler also produced the the Kellogg crank P/N P360285 and P4529095 fully radiused.