Not real sure here but I have what I believe to be a 62 GMC 7500. I have had this truck for several years and used it as a yard truck for my trucking company. For some unknown reason I have caught this but for old trucks. For about the last 3 months this truck has not ran because of the clutch. Not sure if it is the master or slave. I was considering swapping out the motor and tranny to a 350 with a auto. Know after my new found addiction I think I want to keep it original. My problem is that it is somewhat undependable as far as running. Any suggestions on tuning up this old 351 v6? Things such as ignition and fuel? Also I have searched this site for a similar truck and havent found any similar anyone have any pics of a truck like this? Thanks