trying to pull ponnies with little cash

furz4 said
If your running the original 7 1/4 rear it most likely has 2.76 gearing. It's not going to be a tire burner even with 400 HP with those gears. I would change the rear end first and then start with some bolt on parts. You can add 100 HP to a stock 318 with bolt on parts using stock heads. 300 HP is easy to come by 400 will take better heads or head work and a larger cam.

I'd do this and add 3:55 to 3:91 gear's,a 4 bbl and header's as well as a cam. You can add magnum's or ported 302 casting heads,these heads bump the cr up without changing piston's. Or simply mill the current heads. You will need to have around 10:1 so it will work well with a biggish cam.

Or you could always just add nos..