I had my 350 bored 40 over, and am building it this week finally. I just acquired the last of my parts from Summitt. What do you guys think of this setup:

1. Speed Pro Flat Top Pistons
2. Comp Cams - .525/.525 lift, 253/253 duration @ .50 inch
3. Edelbrock RPM Air Gap intake
4. GM Performance Fast Burn Heads (62cc comb. chamber, 210cc int. runner
5. Comp Cam Magnum Roller Rockers (3/8" 1.52 stud mount)
6. Holly 650 double pumper
7. Standard Crank... Still just a 350.. or 356

I had my radiator rebuilt, but was informed that I probably needed a bigger or aluminum performance radiator... I'm looking to go with an electric fan setup. What other specs do you guys need to figure if it's gonna run right on pump gas? My buddy was just telling me to retard the timing, but I hope it'll run good without having to do that. Still looking to put a 2800 or 3000 stall on my TH350, and it's going into my 67 Camaro. Let me know!