FWIW - I have the Crower 60243 in my 30 over 455 with 96 heads, running 9.5 - 1 compression with a Quadrajet in my 4spd '64 GTO convertible. Have had this combo in my car since 2013 and am happy with it. Originally had 3.42 gears in my 12 bolt, but with all the torque I switched to 3.08's as I now spend time on the Interstates going to some shows as well as cruising on 2 lane roads locally.
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