What clutch kit do I need, also need pic of linkage. sm465

[spudz]

I am BRAND new when it comes to these transmissions so bare with me. On my 79 c30 I noticed chatter and chirping when clutch is all the way out. I adjusted it and most of it is gone but not all. I feel something is wrong in the clutch department. I found a bad u-joint and looks like maybe someone put the wrong size u-joint in as its loose in the clamps but I fear its already ate out the yoke on the rear of the transmission. ALSO once the clutch is to the floor, I feel like it sticks to the floor for a second before it releases. I looked at the linkage under the truck and there are two heave springs on there. IS this normal? I realize that once past a certain point the springs help push so is there only supposed to be one spring? Better yet can someone take a pic of the linkage under the truck for me? that would help alot. OK, now for the needing help part. If I need a new yoke on the rear of the transmission.... where can I get a new one? I havent been able to find one. Or can someone give me a good GM number for one? SECOND, as far as the clutch goes. There are several different ac delco ones listed on rockauto. Some for diaphragm and some for lever. I can tell that when I get it out but some are ceramic, some are kevlar" expensive" some are the same and some dont say but they all have different part numbers.... WHAT ONE DO I NEED??? there are too many choices and as heavy as this trans is I want to do this only once.