so doing a little research, on holley site. kinda looking at a holley demon, size wise 625 or 650, doublepumper? not sure which would be better , i dont think my original motor was a H.O, when i rebuilt it i did put in a edlebrock 2156 performer intake and 2157 performer plus cam, headman headers.. and 1806 650 avs carb. the demon looks pretty good for a mild build. and some good sales going on..