Well the second method sounds like the one shown on the under hood sticker, but just setting it at 7°-9° instead of 8°-10° BTDC.

As a matter of opinion, what idle speed do most have their truck set at? Right now this truck is idling at ~1250 rpm and I feel like that's way too high.

I still have yet to actually set the idle mixture to lean best idle. The instructions state that the idle mixture screws should be between 3/4 and 1 1/2 turns out and I just put them at approximately 1 1/4 turns out. I figure halfway is a decent starting point. The instructions did say that if the screws are less than 3/4 turn or more than 1 1/2 turns that a jet change is required, but I'm hoping that if I can get the idle mixture set properly I can get rid of the dieseling problem.

I need to do the Seafoam treatment as well, and then de-carbonize the engine just to eliminate any carbon deposits or hot spots that could be interfering with the tune up.

Once I've got the carb situated and the timing set properly, I'll be able to focus on all the oil leaks.

There is one thing that I'm mildly concerned about... The caliper slides on both sides seem to be seized inside the caliper brackets, and I don't know if I need to be super careful extracting them or if I can just hammer them out. If those slides are a lost cause, I might be looking for a used set of calipers with brackets. I don't want to buy new, because I can't bring myself to put new calipers on old pads and rotors, with an old master cylinder and original brake hoses.