this brings back memories....i had a bagged S10 4 years back that laid frame on 18/20 ...nothing better than layin it out going down the highway and watching everyone point and stare
anyways...you should be able to lay frame w/o cutting on 22's...bigger than that and you will for sure have to start hacking/relocating
you can order all the air related parts (tank, compressor, relay, valves, air bags, air line) from this guy named Jason...he is VERY popular on s10forum.com he has his own fabrication business...he is basically to bagged trucks as what PRG/greg is to lifted trucks so to speak...he is an expert and a nice guy so don't be afraid to ask him questions...i've ordered from him many times and have never been disappointed....his fabricated parts have some of the best welds i've ever seen
check his site out here:
http://www.suicidedoors.com/
get an engine driven compressor (fills tank faster/runs quiet) and get 1/2" valves with 3/4" airline b/c the inner orifice of the 3/4" airline is about 1/2" which means it will dump the air quick so you wont look retarded when it takes 5 mins to completely lay your truck out in the parking lot
go with an 8 valve setup so you can adjust all 4 corners independently of one another...tilt side to side and so on
as for the suspension components...it will have to be a custom job
go with a 4 link either forward or reverse and PLEASE have a reputable and proven shop do the work...i've seen so many hack jobs
good luck