I just started taking apart my 70 malibus 350. I don't believe its stock, the cylinder walls are to clean, but the paint suggests otherwise. So I attempted to look up my engines code.

The code is 3970010
J 76
1013CKH7
17B452478

77 Chevelle 350 ,170hp ,RPO code LM-1 ,TH 350 & 4-Brl

Thanks, i appreciate it