I see what your sayin ,but thats not always the case. With more radical cam profiles, the results are only as good as the tune/tuner. You and I can have the exact set-up but make different numbers. The biggest advantage to custom grinds is deciding where your max power comes in. So then it comes down to what type of race we are talkin about. Maybe your a 4wd guy and max HP isn't important ,so you may want a low TQ grind. Thats something you have to do planning with.
"Generic" VT2 n/a's make all the torque down low and HP up high. So in a 1/4 mile race or high speed race,thats what you want. The TQ digs you off the line to gain momentum and the the HP carries you out. Theres no perfect cam profile. So matter what kinda cam profile you have your gonna lose something somewhere.
Its all about usage ,application and preference. If your never gonna spin the rpm's high,then VT2s probably aint for you.
Big Johnson ,go with Comp springs.They are tried and true in this setup. A good dyno tune can run you $200 an hour maybe less. It usually takes about an hour with a good tuner guy.