I can see a Low Deck block with B-Body headers fitting with a little trimming of the inner frame members, but if you put the same 2" tube header on a RB motor it fits just enough wider that the little trimming of the frame becomes a bigger deal. I bought a Hedman U-weld it kit from 340Shorty and will build my own once I get a little experience with the small tube pipes that I know will fit.