i have a 242 21 spline with a hack n tap sye 50 bucks. I'm in folsom by sacramento
seal leaks and the yoke has been welded to the shaft cuz my tap broke but it runs great. It probably leaks 1/2 quart every 500 miles but i just topped it off once in a while.
If you wanted to change the seal you'd have to drill out the plug weld and re-drill/tap the hole. Probably take 1/2 an hour
I'll even include the 242 shift linkage that worked fine and i'll throw in 2 extra seals i bought