Kinda spendy, but man are they swweeeeeetttt. Not all that hard to adapt to the D300.
And, if you're tearing the D300 down, you might as well modify the shift rails for FWD HI. It's pretty quick and easy and could be useful sometime even if you don't think you'll want it right now.
I really like the flexibility of the cable shifters. The two that I have seen are the AA one you're running, and the one from Whaley Enterprises
300 cable shifter I've had trouble finding a price on the AA shifter. The images on the AA site is not working, but it lists a price of $138. Is that right? The Whaley shifter goes for $270 and is a bit bulky.
I wasn't planning on tearing into the T-case right now, so I'll probably wait on the FWD hi mod. That would be too much justification to go ahead and install the 4:1 gears while I'm in there, and that's just not in the cards right now.
I was looking at the throtle control yesterday, and how the TV cable needs to mount. The articles I've found call for the TV cable to be mounted 1 3/32" from the centerline of the centerline of the throtle shaft.
The stock throtle controler is a plastic half circle, that is only about 1 1/8" radius. I'm thinking that to mount the TV correctly, I'll need to epoxy an extension to the bottom of the throtle control to get the right position. I could modify the throtle cable bracket to also hold the TV cable.
I'm starting to be able to visualize how this is all going to fit together.