I absolutely love the wrench on a string idea, I've never though of something like that. Anyhow, wouldn't a loose jackshaft bolt create a clicking/ticking only if the truck is driving? My truck was ticking just idling in the driveway, even if I pushed the clutch in. Today I out the break in oil in here and took it for another ride, the ticking seems to have quieted a little, I'm not sure. Now underneath you just hear more of a knockety diesel. The oil pressure sits at 30 psi idle when fully warmed up and driven, and goes up to about 60 at 2k rpm. I'm hoping my ears don't device me and that maybe that ticking was somehow just a noise it was making because things weren't worn in yet. Still has a concerning amount of blowby though, comes out in pulses like before which I really don't like. Hoping it's still just unseated rings, I've only put maybe a little over an hour on the engine since the rebuild now so hopefully it'll wear in and seal better