You should also find a casting number on the block, rear left just above where the bell housing mounts, how many freeze plugs are in the side of the block?
1957 Chevrolet 5700 LCF 283 SM420 2 speed rear, 1955 IH 300U T/A, 1978 Corvette 350 auto, 1978 Yamaha DT175, 1999 Harley Davidson Softail Fat Boy
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