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Discussion Starter · #1 ·
I have a small block in my 56 but I am not sure which one. I cant see any numbers except the one on the pad in front of right head. It looks like 10609 cgr. I have found the cgr code but it shows up for a 70 -71 z28 350 and a 70 71 truck 400. How can I tell which it is? Thanks Curt
 
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