I have a friend who has an '88 Chevy 1500 4x4 that originally had a 350 gasser w/NV3500. He swapped in a 6.2L and a later model NV4500. I've helped him get the engine running, but he can't seem to get the clutch to work. I don't know a lot about these systems, but I know that he has a hydraulic setup. The pedal pumps up firm, but it doesn't seem to move the clutch far enough to disengage from the engine. He's pumped and pumped, and bled and bled, but it doesn't seem to help.

What should I check for first? I've never messed with the NV4500 setup. I'm an auto guy, myself.

I'm not sure what flywheel or clutch combo he used.

Casey