Rear U joint on 1/2ton with SM465?

[Chris in Idaho]

I have a 1986 K1500 short bed with a SM465 and a NP208 and 10bolts. I'm getting ready to swap in a 14bff and 8lug front 10bolt and I have a U joint question. I've read that I will need a conversion U joint to go from 1310 to 1350, but I've also read that all 4 speed trucks came with 1350's in the back. Will I need a conversion joint or just a straight 1350? If I need a conversion is 1310 to 1350 the right one? I'd like to get the parts together before I pull the truck apart to measure.

Thanks
Chris

 

[dstrbdxp-AK]

Measure each yoke. That will tell you for sure.

 

[b454rat]

My 84 with an auto had the 3r series in it. If the clips are on the inside, they are 3r, outside they are 1310, 1330 or 1350.

 

[dleroy43]

my 465 1/2t burb had 1350s becouse the sticks are harder on u joints than autos