Got the new cap and rotor and plug wires installed, which took care of the major idling issues. The old wires were installed around the time I got married, maybe even the year before. I just had my 21st anniversary, I guess it was time. I'm still having issues with the fuel filter clogging and uneven fuel pressure. It's caused by rust coming from the gas tank.
I did some searches here and found a thread by frizzle fry:
http://67-72chevytrucks.com/vboard/s...d.php?t=234732
I went to the junkyard a few minutes later and found an ok tank from a 75 blazer. It's got a couple dings in the bottom, some surface rust, but the inside looks good and it has a sending unit. It should be a 25 gallon based on the measurements and it will actually be lower profile than the 72 style blazer tank.
It's warming up so I'll get back to work on the cab soon so the body swap can move forward.