I don't know, Evan. When those cars ran showroom stock, they were strong, but not that successful. The cars were heavy and basically a rebodied Vega. A few came with 305's, but most of them came with 262 cid. Low reving, heavy motors! Whether it's a 262 or a small block 400, it's still heavy. The secret to Chevy power lays in the parts bins that aren't legal for IT. However, if you remember the old IMSA Monza's...they can be made to be screamers! lol