There tuff as nails and and well worth the price........
Had one on my 91 dodge diesel fifth gear, foot to the floor. 70 mph Max! GV and a 3200 gov spring. became a lot more fun to drive. raced it many time(just for fun) wouldn't push the clutch in to spit gears, just let it bang!
Put 20 thousand miles on it. before i sold it. the guy that own is now has has put another 30 thousand on it and pull with it every time it goes out. still running strong!
I can't afford another one, or it would be on my car yesterday!