Is your 318 stock with a 2 barrel? You will probably like your car more with 300-350 hp. Get a custom cam and valve springs to match. Run 3.23 ( 8 3/4) or 3.21 (8 1/4) gears depending on what rear you can find. Sure grip is a plus, but you can always add that later. What brakes do you have now? That is a really nice looking car.