I used old inner tube material on mine. Cut the hole so that it shifts without hitting, cut a small hole in the center of the rubber, put a hose clamp down over the small shaft of the shifter, put on the rubber, hose clamp it to the shifter shaft from below, then cover the whole works with a generic shifter boot that sorta fits. I could never find a boot that wouldn't leak air past the shifter much less water, so the inner tube rubber makes the virtually water tight seal and I made it look good from above with a boot I made from and old denim jacket sleeve and mounting plate from shifter boot I had tried previously. Just be sure to leave plenty of slack in the rubber so the shifter can travel without getting pulled on. For a little extra sound deadening I put some synthetic batting in the upper boot above the rubber.
The hardest part was getting holes lined up for screws. With the cab floor, rubber, carpet, demin top boot, and mounting plate all needing to line up it was a bear to get it right. On the next one I'm thinking I will drill larger holes and glue/weld some captive nuts to the cab floor bottom at least at the four corners. It should be much easier than trying to line up a sheet metal screw through all those layers of stuff and get it to bite on the metal. If you lose the carpet that should be much easier.
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95 Isuzu Trooper Daily Driver
86 Isuzu Trooper reliable backup
77 LUV 2wd stock beltway blaster (resting)
79 4x4 LUV project: 2.6L, 5spd, 31s (eventually)
MEPR: Man, my 4x4 makes all other LUVs look good
