hey Tim.. look me up next time you got g-body questions!!
aerospace is the only one who makes a rear drag brake "kit" for the 8.5 housing ends. The aerospace bracket fits both the 8.5 and 12bolt.
now I haven't researched this a whole lot but I have heard from Mike at TRZ that Strange and aerospace calipers can be crossed over to each others brackets... I believe he said Wilwood as well.
So.. if thats the case then you can order rear Strange brakes minus the caliper bracket, then buy Aerospace caliper brackets. The only thing you may need to do is shim the caliper inboard to get them to line up correct. And shimming is not a big deal as every brake setup almost always needs a shim.
I heard Strange discounts like $20 per bracket off the kit and Aerospace gets like $30 a bracket.. basically a wash.
and Tim.. instead of all that grinding you coulda just got a 1st gen F-body spindle, 1st gen F-body upper balljoint and used TRZ billet steering arms and the brakes simply bolt on with no grinding or modifications whatsoever plus the spindles save a few pounds over the G-body ones.
did I mention I'm also a dealer for TRZ so hit me up when ya need somethin