I have a "modified" rochester q-jet on my 351. I have had motorcraft 2brrl, 4 brrl, Holly, Edlbrock, and even ventured into the EFI. The q jet, while a bit tricky to finally get dialed in, has been the best so far both on the street and on the trail. I pulled it out of the box it was stored infor two years while running EFI, bolted it on and it started right up. Simple to diagnose if there is trouble(why the efi isgone) and much more economical than any other 4brrl I ran in the past