Big horsepower 318 builds

might be better starting with a magnum.... work with the magnum heads, have better deck height and a lighter rotating assembly and roller cam. I'd think a good running stock 5.2 with just some mild head work, RPM intake and 750 dp, and a stout regrind cam would get ya about 400 hp, shop smart and spend about 1300 total ?
When are you starting.:D