USCT Crossmember for 518

Well, the bad thing is, the car was originally a /6 auto....My 360 and 833 setup was added, so the floor is not the manual tranny floor.
I've not looked at the Passon unit, but did the Gear Vendors unit. The idea of the GV unit is wonderful as it would give you TONS of variations. I'm just not ready to drop 3 big ones for it. I found a 518 for a hundred bucks and it's the 46RH from 93 so it should be a fairly nice unit. A rebuilt for a grand and I should have something that will make a nice little cruiser. Dont plan on racing her at this point
None of the floors start out as manual trans floors, even from the factory. They are all automatic floor stampings, then the 4 speed hump is an add on.

The A500 42RH , A904 variant is probably a bit better IMHO. Its a bit smaller, lighter, and will fit the tunnel a bit better though you will still need to mod the crossmember, and can still handle the abuse from a 360. Drag racers use the A500s because they are lighter, and have a numerically lower 1st gear and it helps get em out of the hole quicker.