fwiw, I have VBP 32mm front bars with poly and rear 26mm with poly and this transformed the car.
I am surprised you went the other way first, everything but the bars...
There's quite a few things that I don't like about it. The only car I have to compare it to is an 86 w/ Z51, aftermarket shocks (can't remember the brand) and less than 60k miles. By comparison, the 90 feels very loose and seems to wallow - not unexpected for 180k miles I suppose. It doesn't respond well at all to bumps. The body seems to jump up too far (like it overreacts) then drop back quickly and settle almost immediately - very disconcerting. I could provide a better comparison when I get the 86 back on the road this weekend, hopefully. The poly squeaks but it isn't bad enough to bother me over the rest of the rattles, creaks and buzzes in the car (exhaust is rubbing on the x-brace).
As to the order of mods, I had a diff seal start leaking and it dissolved the rear bushings. Since I also had a ujoint on its way out at the same time I decided to just get the kit and do the whole rear end. When I did the lowering (purely for aesthetics) it was only a few more bolts to get to the front bushings and I already had the shop press.
This isn't really at the top of my fix-it list so I am not planning on working on it anytime soon.
I understand the "while your in there" doing other stuff, "you might as well" go for the polys since it's "only" $180 bucks,
mine squeaks like hell, and they are only on the bars that's another thing to consider.otoh some people boast how instantaneous the reaction to driver input is with polys and that overriding sensation negates all "minor" problem associated with the polys.
