285 xtreme comp cam?

Are you looking for more power, or it's not pulling cleanly? What are the ET, MPH, and incrementals? The 285HL is a great cam, but you should not be "running out of rpm" if that's the case. You may find it get's a little soft on the 60' with it, depending on how much the convertor likes the change. If it's a 10" convertor (the 9.5" shell) then it may not like it that much.