My truck had been hot rodded by at least 3 PO's, and I knew that going into it. Nonetheless the journey has been interesting.
The truck originally had a column shifted 3 speed manual trans. When I got it the trans. was a M-21 Muncie 4-speed. Here's a photo of the
PO's floor modification for the shifterAnd a photo of the 5lb.
custom shifterTo fix these opportunities

I welded in a 2nd gen Camaro floor shifter patch panel and installed a
'57 Chevy passenger car Hurst shifter