[blykins]

Well, if he wants my suggestion, I would ask about the purpose of his car. If it's a just a street cruiser, I would say it's over cammed and he'd have a lot more fun with some bottom end on that motor. I would imagine that he's peaking at about 6600-6800 rpm now depending on what heads/intake he's using. I think he'd have a lot more fun with some low/mid range power.

If it's a late model roller block, he could get a nice XFI hydraulic roller cam and a set of OEM lifters for about the price of a good set of pressure fed solid roller lifters.

If it's a non-roller block, you could either be careful and drill/tap the lifter galley for a lifter spider and use OEM lifters, or you could use link-bar hydraulic roller lifters.

If he wants to stay with a solid roller and spin the motor a little more, I'd invest in a good set of lifters and have the springs checked to see if they still have the pressure that they should.