massive reconfiguration time again.

Question for the masses here...
In my last rear end before I blew up the eight and three-quarter I had 355 gears. I have four tens in my Dana now and the gear change didn't make any difference at the track. Now I would like to put 355 back in the dana. And we can definitely cross off anything real expensive. My cheap *** ain't paying a bunch of money for something that I'm not going to put to the test. The Dana itself and the gears are just so much bigger than an 8 3/4 I can't imagine problems. I feel confident that through what I've read I should be able to put 355 on the current setup that has 410's? More to the question of changing them out? I'm at my end of having someone else do it for what they charge. Of course I'm not afraid to set them up for a first time but worried that I wouldn't have the correct tools as far as getting the pinion set correctly? Of course I would try to put the ring gear in as it came out and use that as a starting point to shim left or right. But again I'm unfamiliar with what it will take to get the pinion in correctly and do adjusting on that or not? Even more specifically would I need a high-powered air tool? Thank you for anybody who has something on this.
Hopefully today I'll get back on the roof and removing paint it seems a little warmer out today or it should be...