[Keithc8]

Just to make things clear we can make over 700HP with the Edelbrock heads but why mess with it when there are better heads out there. I have made close to 800HP with the stock cast iron 4V heads and a lot of work.
If you are going to get into this head deal and HP just go ahead and get some Blue Thunder 4.3 heads or some Ford D4 Cup heads and make 1000HP with a big inch small block. How big is ones pocket book and how much power do they want to make.
There are a bunch of heads out there and a lot of them will achieve the same thing in maybe a different way. Are you trying to use a stock intake? Are you trying to use a stock style exhaust? Are doing everything from scratch and money is no option.
You have to remember that the Engine Master deal will only let you use certain heads on certain engines. Some engines came from the factory with better heads. If they made you use a stock cast iron head the 351C would still be the way to go because it along with the BBC have the best head from the factory. Since they let you work on the head anyway that you want you can da all sorts of stuff. We were filling in the ports on the 351 4v heads 20 years ago and filling the floor on the exhaust and opening them up per NHRA Super Stock rules and getting 370cfm intake and 250cfm exhaust almost 20 years ago. The new Blue Thunder and D4 heads we have will go 440cfm intake and 300 cfm exhaust. It is just time and money and most people do not want to spend it. At least we have after market heads now for Fords, when I started we had to work on the cast iron stock stuff.

Good luck, Keith Craft