Shifter Box Service
Print out Joe's most excellent pictures and take them out to the job with you , then take the whole thing off and over to a table with light colored towels on it , take it all apart and make sure you've scraped out all the old rock hard grease or you'll never get it right .
Assemble as shown , use lots of grease .
Once it's assembled correctly , remember the internal spring weights the lever / dogs to the 3/4 gear position and it's fairly easy to get it stuck in between .
Maybe Joe has N.O.S. parts , I just use shims and grease to make it work O.K. then install it and adjust the box so the shift lever is @ 3:00 O'Clock when both tabs sticking out of the shift box are parallel and level , then and only then you can install the shifting rods , tranny in neutral and use shims to attach the rods so they're not floppy and they slip dead center into the shift arms on the tranny . when the shift lever is wedged in neutral (a bit of rubber or wadded up paper will hols it steady) and the tranny is also i n neutral .
I use brass or nylon tubing to replace the bushings in the tranny's shift arms , Joe and others still sell the nifty rubber ones that dampen vibration , I'm more interested in proper shifting than the shift lever maybe buzzing a little bit .
Thin flat washers on both sides of the shift arms to prevent flopping , I use thin nylon ones from the Hardware store .
This takes time and LOTS of patience but you'll get there , just take it slow and easy .
Don't hesitate to use the materiels you find at hand m the main thing is easy to move but not floppy ~ any stiffness in fitment of anything here , results in poor shifting .