I believe its the last RPO on the left hand column...looks kinda like the RPO for gears at first, but its a front posi...probably a dana spicer trak lok unit.

the posi wouldn't matter for street driving when the truck is in 2wd. i believe posi's only lock the axleshafts together if there is input from the front driveshaft (at least that is how my detroit locker is). in 4wd, tho, that thing would be a beast on the street!

TTT
 

BUMP :D

trade
 

How bout a trade??? I have a rust free 90 chevy stepside 2wd 5.7 auto air runs nice! with new tires and ar rims Thanks Tony

APC427
 

ANY PICS OF 90 STEPSIDE?

pics
 

Its still in storage i'll go down to the warehouse and take a couple, Tony

pic 1
 

pic 1 90 chevy 5.7 auto air ps pb pw pl 10 bolt posi rear

pic 2
 

pic2

pic 3
 

pic 3

trade
 

If your interested let me know I can bring it outside tommorrow and take some better pics, but give your e-mail and i'll send them there, thanks tony

TRADE
 

I'M REALLY SORRY TONY...I SHOULD HAVE READ YOUR POST BETTER...I DIDN'T SEE YOU SAID IT WAS 2WD.. IF IT WAS 4WD I'D CONSIDER {NOT THAT I REALLY NEED 4WD BUT.....} SORRY FOR WASTING YOUR TIME.