I found this in regards to maintenance for a manual box and if you want to have it rebuilt or buy here are the two options searched.
https://www.performanceonline.com/19...ring-Gear-Box/
https://redheadsteeringgears.com/abo...SAAEgJmVfD_BwE
$270 Including tax, shipping etc. (?) double check this price
"Just got done putting in my the rebuilt manual steering box I had done by Red Head. Wow, when they say "zero play" that is exactly what they mean. I've never driven a manual box without any slop before. Rolling down the road, it's
comparable to driving a late model but without the power assist. This is a great alternative for those who don't want to convert to power."