I used a Neapco slip yoke N3R-3-9131X... that part number is for gm 3r joints.. dont know what you're running, but this yoke is long and has a pretty deep counterbore, so less spline area, but seemed like plenty of contact... I didnt cut it down at all and has about 3/4-1 inch travel at ride height on my RCSB

 

Thanks got everything together after waiting for the 4l80 shift cable bracket. Took it around the block, but it was late last night. Hopefully should be all wrapped up today!

 

Ok now the truck is done, but it dies whenever you drop it in gear. Feels like the converter is locked anytime you drop it in gear.

Anybody got some matches?

 

sorry to dig up an old post but i am in the process of figuring out the same thing, what year and what drop was on your RCSB.