Re: "Papa Smurf" - 1966 GMC 1500 Custom
Unfortunately I don't know the answer to that. My 65-66 service manual shows that hydraulic clutch may not have been an option in those years for the 1000-2500 trucks. Only the 3500-5000 had the option for hydraulic clutches. I could be wrong on that, but that's what I've gathered from reading through the service manual.
I do know it is possible to convert from a mechanical to a hydraulic clutch in our trucks. CaptainFab sells a conversion kit for it, and I plan to do so when I eventually install a TR4050 transmission.
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