Notes on my k5 10 bolt --> 14bsf rear swap.
Housing came from an '87 3/4 ton burb. The spring pads line up perfectly, and the shocks mounts are in the right place. It had 8 lug axle shafts. Those were discarded.
Scoured the local Wrench-a-Part, and found 33.25" 6-lug axle shafts in a 90's Express Van. Also took the drums and backing plates (with all its small parts)
The axle shafts had 14mm lug studs. Those were pressed out and a set of 1/2x20 lug studs from Dorman, #610-480, were pressed in.
The new lug studs were just a tad too long for the acorn nuts I chose...Dorman #711-241, so I trimmed most of the stud nose off using a dremmel cutting wheel. The wheel locks included with the Dorman set were iffy for the length I ended up with on the studs. Not going to use them. I probably will get a set of locks that are longer later.
I also scored a good set of gears + G80 from the local Wrench-A-Part out of a 90's 2wd pickup.
Ordered backing plate spacers from CutThroat 4x4. They are 1/2" thick, and move the backing plates outward to line up properly with the drums. The bolts to install those are 1/2"x20x1.5", Grade 8. Those came from Tractor Supply.
Brakes were a slight upgrade. The old K5 shoes are 11"x2" with a 15/16" wheel cylinder. The new brakes are 11x2 3/4" with a 1" wheel cylinder.
Drums I used are stock for mid 90's, but equivalent to Oreilly Part # 2169DGS. They are 6 lug, and are from mid-90's K1500. They are for 11-5/32 X 2-3/4 shoes. The original K5 Drums and shoes are 11" dia also but they are only 2" wide, and couldn't be used because of the length of the axle shafts/backing plate offset/etc.
Brake shoes are Oreilly Part # 473 and are 11-5/32 X 2-3/4 Inch
Wheel Cylinders are Oreilly Part # WC37781. They are 1" bore, and the pad for the flare nut/line is flat, not angled like the old cylinders.
Old gears in the donor housing were pretty worn out, as were the bearings (the Previous-previous-owner probably had never changed or added gear oil). The fresh set of gears from the Wrench-a-part had good wear and great backlash in their donor housing. I took them along with the G80 they were bolted to. The Carrier had decent bearings, but I decided to go ahead and install new ones. I used the old pinion bearings as set-up- bearings (hogged them out with a dremmel until I could just get them on and off by hand with a pretty tight fit. I don't recommend using old bearings as set-up's. Get a second set of identical NEW pinion bearings and make set-ups out of one of those sets. I worked half a day getting the pinion depth & bl set, then put the new bearings on. Things tightened up so much that I had to adjust the shims again.
The old 10 bolt 1310 yoke DOES INDEED fit a 14bsf. I DID have to swap over the dust shield from the 1350 yoke to the 1310 yoke, as the 1310 dust shield was too small of an outer diameter to fit where it needed to go in relation to the housing.
Stock rally wheels fit the 1/2" studs.
Driver side parking brake cable entered the backing plate from the front. It worked fine. Passenger side backing plate only had hole on the rear pad, so my park brake cable had to be fed thru the rear instead of the front as on the old 10blt. Simply had to make sure I used a spare park brake lever that was stamped the right way.
Will post more part numbers and notes later....
