That's even better. I didn't get that far on the Summit site to see that model. The 390 that you have will work but it really wasn't designed for that application. Slant 6 or dual quad tunnel ram yes. A 500 would be perfect and I think the 650 with the efficiencies of the AVS2 would work well also. They are designed for a street (not race) carb with efficiency in mind. Just my take. Anybody close to Desert Rat that has a 1406 he could bolt on and try? I have one but the condition is unknown. Shipping it to you to try would cost $50-$75 for a round trip.