Leaderboard

I'd stay away from the edelbrock Top End Kits & carb, they are outdated. go with Trickflow's top end kit or use 180 AFR heads with a new moderate cam, you can use the E303+ cam its modernized slightly https://www.onallcylinders.com/2022/03/10/plus-is-the-new-e-summit-racing-e303-plus-vs-ford-e303-camshaft-comparison/ or call comp cams, and let them know your specs and your power you want to achieve. Also Intake can stay, Carb will need to be changed, maybe to a 650 cfm. (stay away from the edelbrock carbs), Headers will need to be 1 5/8 at minimum, I suggest long tubes. I have a 427w stroker w/ world products block from prestige motorsports and putting down 460hp/475tq to the wheels with 3:50 gears. I have a 750cfm, Stealth Intake, and 1 5/8 headman headers.

That engine had around 200hp, 295ft/lbs of torque from the factory with a Holley 4180. You might get 10-20 HP with just a cam change. The Stealth manifold fits well under the hood but again doesn't help more than 10%. The distributor does nothing for HP. If you want 400HP, that's doable but it will require a combination of carb/EFI, aluminum heads, intake, cam, headers, and exhaust. Something like an Edelbrock top end kit would simplify the choices, or you can blindly pick and choose and hope for the best. If you're like most of us and not an engine builder it will take a lot of research.