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Member
Join Date: Aug 2002
Location: Florida
Posts: 103
Likes: 79
Liked 12 Times in 6 Posts
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GM did use some blocks for 3.875 and 4.00 such as the 3789817 is a 62-67 327 block but I have one that is 3.875 and was used with a 3.00 crank for 283 in 1966. This makes for a very thick cylinder wall but leaves a lot of room to bore.
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