if you dont have the money to do heads and cam just do boltons first

 

i would go with the cam already have long tubes can do intake later

 

Totally a no brainer and do cam first. It is a lot harder job than the FAST and will have 3-4 times the gains. Take advantage of your frinds willingness to help. It is a pretty tough/technical job..

Then throw that Fast on later when you can.
Many people hype the FAST but it is a lot of Moolah per horsepower. For most people a LS6 will stay right with it unless your build starts to get on the radical side so think it through.....Just my thoughts (and I have a 90/90 so I know what I speak of...)

 

u need bolt ons for a cam to work at its full potenial.