Better Torque From A 318

What power level you trying to get?

Sounds like streetaability is important to you so probably 0.8 to 0.9+ hp per cid about 256-290 hp.

Not really that hard there's slightly different ways to get there, mainly different head and cam combos, less flow more cam, more under .450/.500" flow less cam. Bigger cam is gonna be less streetable than better heads.

Say you decide 9:1 4bbl headers and a 210 cam then stock heads be it 318 or 360 or magnum or speedmasters or some ported version of them is gonna decide hp amount.