http://67-72chevytrucks.com/vboard/s...d.php?t=300087
The T-56's are hydraulic clutch. I sort of used this article as the basis for my hydraulic clutch T5 in my '78. Basically you need to mount a master to your firewall and connect it to the slave on the trans. You just need to look at it a little bit. I used an '87 bellhousing and the master cyl from an '88, i used the line from an '88, but I had to bend it up something ugly. If you are near any farm supply places, they can whip you up a hydraulic line, or by the same token any place that services AC or 18 wheelers can make you a custom line for a few bucks. The clutch in my truck feels like maybe it doesn't completely disengage, but then again I'm using a beat up original 1983 camaro T5.
I think shifting gears is pretty cool, but to be honest with you...on the next one I'd probably plop in a 700r4...these trucks aren't sports cars, and I live in the city with lots of traffic, so a automatic, while losing cool points, would be a lot easier to drive.