[BarryGMC]

The thing is toast. Pull the flywheel and have it resurfaced. 2 options on the clutch. put in a 12 inch clutch out of a 1-1-2 ton truck with a v6. Thats what I do on both gmc and chevy. I will put some pics of these on later after I go to the shop. Second take your clutch to the napa store and have the counter help compare your clutch to a chevy, buick ,pontiac. 11 inch clutch. Tell the guy you want to see a clutch for a 76 chevy 3/4 ton 4x4. He should have that. Compare the disks. they will interchange. There may be some visual differences depending on who made it, but that wont mater. Now the pressure plate is where you have to get creative. First the distance from the face of the flywheel on the gmc v6 to the mounting surface of the trans is aprox 5.75 inches. on a chevy with a truck flywheel it is aprox 4.75 inches. Now you see a range of measurements in the B,O,P. also, so there is a range of thicknesses of the whole pressure plate assembly, with gmc being the thickest. These differences are dealt with in a few ways. Ball stud height, and throwout bearing changes in conjunction with pressure plate thickness, and release finger design. The reality is you can see thicker pressure plates in the narrower dimension and thinner pressure plates in the wider dimension. Nothing has to be custom here. Especially the disk. Now finally in regard to the pressure plate. If the plate is not deeply scored you can resurface this also. However you need the services of a nice machinist. Barry