A833 E Body 23 spline Fully Rebuilt- New Parts: Brewers Master kit, Input shaft/4th gear, 2nd gear, 3rd gear, synchro rings, cluster pin, shift forks, tail bushing NOS parts: 1st gear + cluster gear. Synchros are near perfect. 4.35 Retainer; 4.8 can be provided. Case blasted, all threads...
It’s harder than you think due to the nature of the style of bolts used to hold that shifter pad -a correct straight drill angle is very vital and so is the center center to center measurements. You could have a machine shop drill them for you for peace of mind.