Thanks Mike, when I had the diff. cover off I forgot to look for teeth numbers but I was leaning towards the 7.20 from what I was reading on the GM Heritage specs, I appreciate the confirmation.
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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