Just took mine for a test drive.
It is slightly more peppy I would say, not enough to tell the difference if you hadn't driven it for awhile. Revs quicker for sure and all the gauges are performing as they should. Mine had a different sound maybe from the new belt kinda a low whine.
The install took about 3 hours total. I ended up taking my radiator fans out which gives more room. I also used a 3/8 extension slide in between the drive shaft yoke to lock the motor up. The problem you have is you will still have some slack in the drive train which will back off your progress when you turn the crack bolt with your Big Fing breaker bar.
I finally had my son pulling the breaker bar from the top as far as he could then I would hold the socket with channel locks from the bottom so he could rotate the ratchet to get more pull on the bolt we did this 3 times and it finally came loose.
Probably the most frustrating thing was working the alternator off and on. I spent probably 15 min working it off after removing the 3 bolts. I used an impact wrench so take the nut off and back on no problem there. Then spent another 30 min or so working the alternator back into place. Mine was a very tight fit. Everything else is pretty straight forward just button everything back up.
The NST pulley's are both very well made and the crank pulley is much lighter than the OEM one. Hats off to Mike and the NST team
