I'm no expert. There are wiser people than me to give guidance, but I will give it a try.

I suspect you will need a custom grind. The focus should be on the lobe separation angle, overlap, and intake closing. LSA no less than 113 degrees. Overlap no greater than 45 degrees at .05". Intake closing should be dependent on static compression and stroke.

Lift will have no effect on torque curve or idle so get as much as is reasonable. Duration should stay within the boundaries of a wide lsa and early intake closing for idle quality.

I would look at the LSA, overlap and intake closing of a stock magnum or gen III for a starting point.

Good luck.