I have almost 30,000 SC miles between 2 five pound Roe cars. I have 3.45s, hi lift roller rockers, and a light flywheel on the 00. Couldn't be happier.........no issues at all. The low end grunt also works great on the track.
While the Paxton can be a DIY, there have been some horror stories on DIY GEN II Paxton installs. That was a couple years ago......Maybe those issues have been worked out. I put my Roe on and tuned it...never having ever done anyrhing like it before. You don't need a dyno to tune the car. You can do it yourself with the software and a laptop. Paxtons spool up and make their big power high up in the RPMS. I very seldom go over 5200-5500 RPM....if I can catch 1st and 2nd gear

Keeps the revs off the engine. That's a good thing. Almost 75,000 miles on the car in the picture now.
Steve