Info Wanted - SCCA 2.96" Stroke Engine

What displacement are you aiming for? That is a lot of expense if there is not a lot of difference for 10 or 15 cubic inches. How much could a stock steel crank be offset ground to reduce the stroke and accept Chevy rods, with say a 3.91 bore?
For this exercise it was <305ci for D engine class. For C class it run from 306 to 372.999. There is now (new 2025 book just came out) only a 13mph difference in the 2 records. Doesn't seem worth the extra cost.

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