Rear Lateral Stability W/ leafs and sliders?

I've started mapping out a budget for y truck and have decided to split the project into two stages.

Stage one:
4WD 2Dr Blazer/Jimmy 89-91 preferred 4.3L
Weight Loss Program(remove 4WD, most interior)
Front coil-overs w/ stock lowers
SPC adjustable uppers w/ metric BJ plate
2WD 2" drop spindle
QA1 rebuildable custom LBJ w/ metric mount and 2WD S10 pin
Chrysler Leafs in rear
Sliders to replace shackles
Front Pivot Bushings for leafs
Shocks(double adjustable, probably with custom mounts)

My question pertaining to this set-up is, with the sliders and front pivot bushings are the rear leafs going to be adequate for lateral stability, or should I drop in an aluminum panhard while I'm under there just to be sure?

I'm not 100% sure what leafs I'm going with, but I've been looking at the AFCO leafs with longer leafs in the front to hopefully avoid needing slappers or anything.

From what I found on the web you don't need a PHB with the sliders.
What bushings are they? Similar to these?
http://www.deaverspring.com/products/bushings.html
The bushings may create the need for a PHB.

A PHB would be nice for the RCH adjustment though...

Yup, that's pretty much them. I don't know that they're completely necessary, but with the suggestion toe in on leap springs to get roll center better under control, I didn't think there would be enough flex with the sliders and a rear poly or delrin bushing to keep the springs from twisting. I guess it's six to one half a dozen to the other, I could cut down on roll and lateral movement with just using bushings up front, but might cause more twist than I really want in the springs, or I could use those bushings in the front and possible necesitate a panhard bar.

I would use the those bushings up front, delrin on the rear and a PHB.
I don't think our trucks have any spring toe in factory but if you were to add some it may help with the lateral location sort of like triangulating link bars. I would still worry about the springs trying to twist using both sliders and those bushings.
All I know for sure is leaf springs can be a whole hell of a lot more complicated then link suspensions when it all boils down.