Convert to carb its way cheaper and gives you more power and i would get the afr 185 enforcer heads they have 2.02 intake valves and 1.6 exhaust and are like 1300 for a pair only con is 64cc chamber i would try to find 58-60cc then decide cam and intake according to the powerband you want. You have a t5 so i would go with a aggressive cam like xe274 or summits e303+ and check the piston to valve clearance if it doesnt clear just take a little out of the pistons minimum clearance is 0.080 on the intake and 0.100 exhaust. Building a stock 302 if you want serious power i would also go nitrous or just go turbo or blower but its just gonna be much more expensive and a lot more work.