hi there,

here are the engine specs,

400 block bored .30 over
440 source 515ci blanced rotating stroker kit
Main studs, Gridle, windage tray, modified deep oil pan,
440 source Stealth Heads
Isky 292H Cam I belive is good for alittle over 500/500 lift,

I recieved these 1.7 rollers as a gift to help my engine build, I was told it would also help to raise the amount of lift.

I was thinking of just buying the whole 1.6 set-up from 440 source and see if that helps.

What do you guys recomend i do?

This is going to be for a race car as well.

Thank you for the help,