91 Rear end swap
 

i have two 91 blazers i am swapping my original blazers rear end with my parts blazer rear end and im all ready to go just wondering if Using air tools is a no no??

Depends on what you are taking apart. I always like to break things loose with a breaker bar, then use the impact after that. If you have any exposed threads, clean them with a wire brush so that it is easier to remove the nuts. Use plenty of penetrating oil. If you hit resistance with the impact gun, stop, spray on some more penetrating oil, then tighten the fastener back down and repeat as necessary until you get it all apart.

tahnks for the input thats all i really wnated it was to break loose some bolts i've been spraying the bolts with PB blaster the last two days in perpetration for today im a go get at it now thanks alot hopefully i wont have any problems