Different racing setups "Abodies"

I tought that it was impossible beside the oval track racing cars.... ive found some 2bbl dusters and barracuda with 318s and 2bbls , i was quite surprised , lots of chevys of course but its fun to see that you can run with à tint 318 and à 2bbl and have respectable set ups ! Any of you guys saw this or have any more infos ? :)