I'm going to see about digging in again this weekend. Both water pump gaskets will be replaced, I'll add a little sealant, and we'll see what happens. For the sake of safety, I'm once again cruising the streets in the ol' wagon...which has a grumpy 4th gear.
Many thanks to everyone who dropped by on Saturday, and HUGE thanks to Mr. Roadster for his uber-generosity and help!