340ci vs 360ci engine

Actually I'd say starting with a 93 or newer 360 block is the best of all. It just has 20 years of improvements compared to the 340. I'd keep the magnum heads and serpentine belt setup too adding an electric feul pump. Then use the Professional Products Air Gap 4-bbl manifold. Get an aftermarket roller cam and have the heads ported some. Should be able to make 400 hp cheaper then any other way.