Fitting a 3/4 ton drive line to a NP203 t-case

[odoa3]

I am getting ready to swap a 14 bolt into my 75 K5. The 14 bolt came out of a 3/4 ton late 70's or early 80's truck with a NP208. I have a 203 t-case in the K5.

Couple questions.....

#1 Will I able to fit the 3/4 ton driveline to the 203 or will I have to change the yoke on the driveline or t-case?

#2 Can you take the yoke off the 203 and put a 208 yoke on it so the u- joints will be the same? I am guessing that the deciding factor would be output shaft spines?

 

[blazinzuk]

Aren't 208s slip yoke output in the rear, and 203s are fixed yoke output in the rear? Just take the driveshaft that is in your blazer now have them cut the end of the 208 dshaft (the one that hooks to the axle) and have a shop weld it on to the orginal driveshaft. I think you have to shorten the driveshaft just a bit anyway don't you?

 

[mouse]

I'm just running a conversion u-joint from napa.

 

[R72K5]

203 were in alot of 1/2 and 3/4 tons 73-79/80

tons, coupel different size output yokes and u joints, some of the late 70s k20 and such had a coupel different sized yokes and u joints in the driveline from factory,