Advice or...

Gonna need a good cam, heads, and better pistons. For the heads on the 318 I recommend the casting number 302 because they are swirl port head (increased velocity!!) you can use some hyperelectric pistons, I recommend Keith black pistons (believe the number is kb 107 for the part number) and the cam depends on rear gears (and rearend) the tranny your using and torque converter (assuming you're using an auto tranny).