[2ndGenRR]

The ZR2's were all 4WD so they won't work. You need a 2WD, so any 98' and up 2WD Blazer will work including those with the ZQ8 handling package. If you find a ZQ8, grab the sway bars and lowered rear leafs while you are at it.

On the subject of A-arms, any GM metric arm will work and the G-body arms are usually less expensive for the same exact thing. I have tubular upper and lower control arms, with the lowers being set up for coilovers. I got the SPC lowers from Savitske Classic & Custom (http://www.scandc.com/index.htm). Those were not cheap, but they have some definite design advantages and I wanted to run coilovers for height and ride adjustability. I have a set of the adjustable SPC uppers, but the chassis ended up being for my buddy and he didn't need anything that extreme, so I picked up a lower cost tubular set off of ebay. It will definitely handle and stop beyond anything you will ever need for the street...in other words, he will never approach the limit of their capability.