High Performance 318ci

Sounds like you friend wants just a basic hop up, 650 4bbl mild cam duals and a good tune up.
And you want a fire breathing monster, if your use to big blocks they have so much torque you can afford to throw away lots of the under 3000 rpm power especially in a light car with deep gears and high stall. A 318 ain’t like that especially in a heavy car with high way gears.

What power level are we talking about 250-300 hp 300-350hp 400 plus hp.

the stock 318 heads are good for about 300 hp, after that you either have to port or go with 340/360 heads or magnum or aftermarket.

To me Trick flows are for 500 plus hp. You could bolt them on a lesser engine.

If you want more than 300 hp
I guess I would be thinking like Eddy heads or pro comp, EQ’s, or even just plane old Magnums.
With a roller hydraulic or just a regular solid cam with .500” plus lift but 210 to 220 @ .050”.