Originally Posted by hdconductor
I like to go fast and understand that these are as big of bolt-on's I can do without touching anything else in the motor.
Agree with previous responses to the 583 vs 585 question but you can go bigger "without touching anything else". Or were you meaning you are looking for optimum results from a cam only upgrade and just not wanting to do anything else to the motor?
If that is the case, you might look at the Andrews 48 or Woods 222which are designed as "bolt in" cams for the 96"ers. You won't hit 100hp with any of the aforementioned cams though, you will have to make other modifications to hit that number and have a good tune.