To answer OP's question about install tips for the Powertrax, there really aren't any. The instructions are very straight forward. Took about 2 hours taking my time (on the ground). All the posts about the clicking are correct. Had a few guys at the car meets tell me my rear was going up cause they could hear it, but you get used to it. Locks up solid EVERY time. Just verify an open carrier and not assume one due to only one wheel spinning before you order one. Think when I bought it it was right at $300. As far as power handling; 2 seasons of every friday night at the track. Survived 1.59 60's on the brake, though most were street tire runs in the 11.7x @ 117-118 range. And of course, lots of street pulls in between. Was still going strong when I pulled the rear out of the car.