The ribbed version is the later model years. Are the brake drums the slip on style too?
Also ordered the rear locker and R&P from CCOR, got the lifetime warranty with the locker, pretty good deal. Also saw a video yesterday, wish I had a link for it, that was supposed to motivate us...our A-10's blowing up a few old K5's and 3/4 trucks...my boss asked me what I got from the briefing...apparently "they waste alot of square body chevy parts" was not he answer he was looking for 


also ordered a new grille from LMC. The billet one on there now doesn't really do it for me. Oh and she's finally street legal
Looks like a nice truck!
I wouldn't put the springs under the frame, it introduces alot of body roll. I had mine there and moved them just outside the frame, a touch narrower than stock one ton width, that's a good trade off


