Woohoo! Finally jumped my timing chain!
Checked the heights of the valve stems with a rigid ruler, and it seems some of them are down lower than they should be (of course I took the rocker shaft off first). Gonna do a compression test tomorrow and see what comes up, I'm gonna bet it's gonna be low on either cylinder 6 or 8 (didn't check the other side yet). Just in case I do have to go through the engine I bought a book on rebuilding Mopar small blocks and my neighbor up the street (Ford guy, cool though) said he has a hoist and will help me pull the engine.