Match Race 1966 ~ Valiant 273/235 HP vs. Belvedere 383/270 HP

What I expected,unfortunately. Now when do the "class legal modifications" ,start? My brain tells me more camshaft/better valve springs /whatever is legal on intake tract/full on headers/273 build. 383 combo, the same. The equal work to both, inches will shine,in the long end in class racing.(unless there is a change in NHRA rulings)....