I just had another thought, I have a nice 318 short block SCAT I beams .030 KB167 pistons in my 68 cuda, has 302 heads right now. If those 273 heads are only going to flow enough to make say 450hp (could run 2.02 valves in a 318) might be just as well off useing that instead of building a huge inch motor that will make way too much tq any how. Mabey I will do some testing with that motor in that car before I yank it for it's own future stroker.