318 combo help

The aluminum head option will help only a little. Even less if you go down in cam size.
IMHO, that teen is set up to kick some *** minus the head is and exhaust. If it were myself and I had the funds to complete the package for some brand X *** kickin, it would be the aluminum heads well prepped and bowl ported with a set of to headers into an2-1/2 exhaust. I would certainly used a 1.6 roller rocker!

The tti's will work great. Very good clearance and fit.