A friend of mine bought some just for the sound. He has a Whipple 3.4 and stock ported heads.
He bought the Crane stage 2 kit. After 1000 miles a retainer broke and it took out the whole motor.
He found out that the springs that come with the kit were very poor and thats why it dropped a valve.
He only picked up like 30 HP running the Whipple 3.4 @ 21 psi.
For 30 HP and a chance of dropping a valve, I'll keep the stockers.
cams are the last thing I will do. I'm at 684 with a whipple 2.3L stock shortblock with 80k on the clock roughly. custom cams might yield me a significant gain. but unless your over 500, I wouldn't mess with them. also...if your over 500....do them either WITH long tubes, or install your longtubes first. I don't know what mods you have done....but I would think about it long and hard. if you do it. custom grinds only. and remember you get what you pay for....so don't skimp.