gotta say a power adder like turbo, nitrous, or supercharger is gonna be the best bang for the buck. Visually and speed related. A power adder will outrun a built engine for the same amount of money.

Of course there ain't nothing wrong with just running an 836 with some headwork and cams.

Bottom line is you probly ain't gonna beat something really fast like a ZX-14, but you can be a lot faster than you are.:D
Drunk Again In Hollywood, El Wayno