The lumps help at ALL RPM's. They can add almost 15 ftlbs tq.
Porting will probably help also. It depends on what was done when the larger valves were installed.
Decking the head might not be needed if the block was cut .030 and you have LP pistons.
That short duration cam and higher compression may not play well with detonation.
What distributor are you using? Trans and rear gears?
