Took the shifter out and there is one slot on either side of the shifter that is "hogged out". Looks like I need a welder/machinist or just a new shifter. I'll take some pics of the shifter later today.

Oh yeah:

IT RUNS!!!! Drove it around the property in Reverse and granny low. Just a mis-wired ignition switch. The bed goes up and down just great. The motor has a sort of clanky/grindy sound to it that I hope is just the water pump. But for $400 who can complain if I have to rebuild the engine.

1955 Chevy Dumptruck
2003 Chevy 2500HD: Crewcab, Longbed, 2wd, 6-speed manual
2005 Pontiac GTO: 500hp and a transbraked TH400