I have a '84 K5 that I put a 2000 SS camaro LS1 with a 2000 tahoe 4L60E. I am currently running the stock 3.08 axle set and they are fine for the highway, the 10 bolt with a true track is holding up fine with over 200K on it. I have a 44 and 12 bolt with LSD for it with 3.73s and am planning on running the 44 with a true track but I want 4wheel disc so I am wondering if I should put discs on it or just get a newer rear end with discs stock.

 

What size tire are you running. The D44/12-bolt combo, especially locked, will limit out between 33 and 35" tires depending on how serious you get offroad.

A K2500 will have a 14-bolt rear axle and may be SF or FF (semi- or full- floating). The spring perches will be too wide for your truck so they will have to be cut and moved.

It really comes down to what you want out of your truck. If it is a pavement pounder and doesn't really see much offroading, the 1/2 ton running gear will suit you just fine.

 

I run 32x11.50 and will never run more than 33x12.50. I use it mostly in the snow/sand and for towing. I don't want a FF and plan on using my current aftermarket wheels.

 

If that is the case, then I would pick up a disc brake conversion for the 12-bolt and go that route.

 

Any recommendations on disc kits? I have discs and calipers from a 2000 tahoe or something, I would have to fab some caliper to axle flange brackets and 86 the e-brake.

 

It looks like there used to be kits available for the fullsize trucks, but I couldn't locate any through a quick search. One company used to make the brackets and then had a list of off the shelf full size car parts to get.

From what I researched when I was thinking of doing this on my Chevelle, all of the parts came off of a 77-79 Cadillac Seville. If you don't want/need the e-brake capabilities, you can use fullsize gm car front calipers (which is what I remember the truck kits using).

Most of the stuff that is available anymore is for the 14bolt.

You may want to just try picking up a rear end out of a newer pickup and move the spring perches in.