Dolamite, I'm interested in how you did this... I know it's not rocket science, but if you can share some photo's and procedure, I'd like to check it out...
I pretty much followed the instructions found here:
My Jeep CJ5 Page - Hand Throttle
Below are a couple of deviations for my install. I would suggest taking your time and doing a cleaner install than what I did. I just wanted to get something hooked up that worked. It isn't pretty, but it is comfortable and seems to work great.
1) Used an $8 lawn mower throttle cable from TSC. The 48" cable length was perfect for the application.
Arnold Universal Throttle Control - Tractor Supply Co.
2) Mounted the lever on my shifter just below the knob and ran the cable through the shifter boot. For me, the location on the shifter was more convenient. I like to drive with my hand on the shifter, so this will be more comfortable.
3) Drilled an "interference" fit through the throttle bracket so the new throttle cable fits snugly. Secured the new cable with zip ties on both sides of the bracket so it won't slide back and forth. I used a right-angle drill so I didn't have to remove the throttle bracket from the carburetor to drill the hole.
4) Instead of a toilet flapper ball chain, I used a thin piece of nylon cord. I tried to use the ball chain, but I kept snapping the wire when I tried to attach it to the throttle cable. The nylon cord I used was much stronger. I burnt the knots very slightly on both ends of the cord with a lighter after I had it attached to the throttle cable and the electrical ring terminal that I used to attach to the hand throttle cable to the throttle linkage. Doing this should keep the knots from slipping.
Initial testing was very positive. I was able to take the rpm's up to about 2800 with the hand throttle, which is a value I am comfortable with.