Big block or small block?

[Rev]

Small blocks can be stroked to 427 CI and would be a heck of a lot lighter. You'd also have all the Windsor after market stuff readily available (heads, roller cams, etc.). That's the way I'd go.

Rev

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'66 Coupe, 306, 300 HP, C-4, 13.97 e.t., 100.3 mph
1/4 mi.