Right off hand, here's a few observations and recommendations. First, I'd get a stronger rear end. Slant 6's will blow a 7 1/4. Second, if you're going to run cast iron heads and pump gas, I'd keep the compression ratio under 9.5:1. Third, I think that's too much carb for that setup. I'd look for something around 650 CFM if you're running a Holley. You can go bigger if you run a Thermoquad, but, it's really not necessary. Since you're not racing, you want something that's not a bear to operate on the street.
