400+ hp

It would be nice to use 4v heads I think preferably with the studs with rockers so you can utilize more cam lift. I'm not sure how much lift you can go with pedastal rockers but spring pressure is limited. I think for 400 plus hp you will need 10.5 cr stock 4v heads or massaged 2v and a cam comparable to a f-246 crane. A 750 or bigger carb and good intake Some one on here will know the limits of the pedestals or maybe Falcon has a idea his combos are working good. I think without any serious head work you can meet your goal quite easily. George may have a 4v combo that's budget friendly ?