Hydraulic clutches are a popular conversion with the 4x4 crowd. From 1985 and up I believe GM was putting a hydraulic clutch in its S10 and full size trucks. It would probably be cheaper and easier to source the parts from the newer models rather than the 60-62 Chevy's (GMC used hydraulic from 60-63 but only behind the V6 and that bellhousing wont fit a V8 or I6).
