Grham, depending on the level of porting, I myself would be looking at someing like these Comp Cams.
280H or.
there updated version of the Mopar purple cam,
PP280H which has a slight bit more exhaust duration.
If your heads are ported for higher lifts than .500, the
XE275HL @ .525 lift will add few more pony's under the hood.
These are just some examples from Comp Cams. Remember, theres also Lunati and Huges to look at for some decent off the shelf grinds that will perform well.
All of these cams are in the 230+ @ .050 duration range. I really would not exceed 236 @ .050 with your current set up.
