I'd be on that bandwagon also..i have a 96 4 door 4wd Tahoe that would so get a sas on it! if it was just a matter of buying the brackets i would do it alot faster...I'd like to see the front brackets done like kerts bumper center w/spaces for the spring to bolt to & the radiator support also built in to bumper center & that whole piece bolt to front frame rails(if that's possible on 88-99 models), I've seen him build the bumper center for the 2nd gens w/all the goodies built onto the bumper center like i described. and i would trust kert when it comes to the best way to mount the rear shackles on the front spring.
i would go on the hunt for a 77-79 ford 8 lug front end...i want to leave engine/trans/t-case all stock and just swing a ford axle under it, then have a d-shaft made & hit the road.(it wouldn't get wheeled, just a mall crawler) i guess i would go w/a ford 8 lug, as i have a rear 8 lug d60hd, that's been sitting for yrs, i could put it in the rear, so i would have matching bolt patterns front & rear.
unless i could find away to make the ford front axle have the correct 6 lug Chevy pattern. i haven't verified it or tried to match part #'s yet to see if my cousin is giving me correct info. he has a 77-79 ford w/a high pinion d44 w/the stock 1/2 ton 5 lug rotors and calipers. he also has a 85 k5 that's lifted & running 42's & it has unknown year 8 lug d44 under it,(it has external hubs, if that narrows down the field) he has rebuilt both the 8 lug d44 under his k5 & the 5 lug d44 under his ford, checked and repacked the bearings on both alot of times,...and he swears that the inner/outer bearing & seals are the same between the ford 5lug d44 rotors & the Chevy 8lug d44 rotors in his k5. from the way it sounds, you could put a Chevy rotor on the ford d44 spindles and have a correct Chevy 6 lug pattern on a drivers side drop diff axle. anyone know if that is possible? that would make it alot easier to find a ford axle w/Chevy bolt pattern to use on the sas....altho 8lug would probably be better off since i want to run 39.5's on my sas'd street queen Tahoe.