Believe me, I'm looking at all sources and options. There aren't many Cruisers posted on Craigslist in the Spokane/Coeur D Alene area.Check your local CL, seems like mine always has 1-2 F/2F engines being sold or parted. Might be able to find a local head cheap.
Thats what happens when people use the wrong sealant in spots they shouldn't. The machine shop said you wouldn't believe the amount of engines they tear down and find the oil strainer filled with silicon sealant. There is a reason Toyota uses FIPGhey man, looks like fun...I'm just over the hill near Missoula. Interior looks amazing!
That thing on the block is a block heater...just needs a new cord, it'll pull out of the socket just like a power plug. Oil sender is on the other side, down by the filter on the oil cooler.
Have no idea about the coolant not draining. My water jacket was full of silicone blobs floating free. Really irritating, as they could have caused all the trouble I had with my head, blocking passages and whatnot. Hopefully that's not your problem.
You could maybe pull that block heater and have a look, I believe if you loosen the screw at the center it should come out easily. It's like a rubber expansion plug.