Here's an update.
I mounted the subframe using Global West solid bushings, mounted the GW upper arms, painted the stock lowers. Upper and lower arms have poly bushings. I also mounted the stock rear-end for the time being so that I could get this to roller status. The brakes will be C5; I picked up a set of calipers for a good price, so I guess I'll be giving Kore3 a call for some brackets and hardware.