How to make Horsepower?

Thank you very much. It has got a 7 1/4'' rearend with 3.23 gears. I'm thinking i will have the heads milled out(intake,exhaust), bigger cam, offy dual 1bbl intake, and headers. I am gonna see what that does for me and if it doesn't come good enough for me then maybe a 340 will be put in.

the money spent on the slant to get you very little hp could be spent on the 340 or 360 (360 is cheaper and more readily available) and you would have 4X the hp as the slant.