You know: there is NO replacement for displacement!!! (Turbo stuff aside)
Seriously, if you are going to go into the trouble of tossing a V8 in there (which means that you need to move to a V8 trans as well), why not go for max ROI here?
The stroker kits these days aren't all that much more, heck maybe even cheaper than getting your own stuff machined and spending the time on making sure it all fits together, no?
Just a thought...
OH, and the ISO stuff...umm, maybe I'm the only one here to feel differently, but POLY is going to fix whatever OEM mushiness you have in there, swap the front spring eye to a ROUND poly bushing as well (that would require replacing the main leaf of course), or simply get the poly oval bushings.
Anyways, the ISO poly biscuts fit just fine, they are solid man, and to boot that approach just has you re-use any existing top plates that have the sway bar end-link mounting tabs on there already.
For what it's worth: this winter will have me swap out the 3/4" rear bar for a 1", and that's with all POLY stuff at the back...car already handles very nicely, but being the sexy shape of a brick shit-house anything else you can do to control the body roll will certainly help!!!