There are S10 trucks, S10 Blazers and full size Blazers. Not all 10bolts are the same. The S10's are 5 lug 2wd or 4wd and full size are 5 lug in 2wd. The 4x4 full size is 6 lug. Everyone is just giving you ideas of vehicles to measure/study. I myself have already said not to pay attention to width regarding 4WD/2WD BUT..........sometimes it has to do with the number of LUGS! 5 or 6. First decide if you want a 5 or 6 lug rear end and THEN we can all move forward. Second measure your WMS-WMS and report. There are several size (ring gear)10 bolts. But you can't be too choosy. It's the width you are after.
I have never used a S10. The 4wd are said to be about 4" wider than 2wd. 4WD is said to be about 59-60" wide. So 2WD would be about 55". I think these numbers are in your ball park.
80's Camaro's (5 lug) are said to be pretty close in width for an AD truck. Mostly 3.08 and 3.42 though. Whatever you use, you will strip off all perches, trailing arms, panhard bars and brackets and do the mock up thing with your leaf springs sitting on new perches and then when everything is right, tack weld the perches, pull out the axle and weld them on. It ain't rocket science but it ain't changing oil either.
