theres no replacement for displacement aero
If you GET a GOOD deal on those heads get them!
you can run a oval port intake from brodix[HVH2007]KEEP YOUR BOTTOM END TORQUE AND HAVE PLENTY OF HEAD FOR THE TOP END & SAVE SOME CASH!
if you need more top end SQUEEZZZZZZ!
& RUN A 2" 4500-TO-4150 SPACER W/A WELL TUNED 1050+ DOMINATOR.