My pump gas 470 makes over 700 hp running unleaded premium. That is why I suggested he switch to the TF heads. The Wilson ported intake that I used on my 470 is for sale in the race section so all a guy needs to do is build a 470 short block with flat top pistons then buy 240 heads from Summit and add the intake that I have for sale. That will give you 700 hp which should run low 10's or high 9's depending on how well the car is set up.
If its making a " track proven" 700, a 3200 pound car will run well down in the 9's easily.
My old w5 motor " made" 708 on a dyno and backed that up running low 9.60's at 140 in good air on 002/003 leafs and cheap shocks. So nothing trick about the car setup at all.