The Dansk muffler is going to go on this car, but first I want to fix the basic problems. It looks like the oil leaks are fixed, but there's still some coolant getting away.
I had thought that the problem was related to the oil cooler and hoses to the coolant tank. I finally got the kinked coolant hose replaced. That part of the system looked good. I could have replaced all of the clamps and hoses while I was there, but the others don't seem to be having a problem.
When all the parts were back together, I went to a car wash to rinse the underside of the engine and transmission. With most of the residual oil cleaned off I drove the car for about 30 miles; carefully at first keeping it to about 3K rpm, then doing some good runs up to 6k rpm after I gained confidence in it.
All was going great until the coolant temp light started blinking, indicating a low coolant level. Only about a mile from home, I continued - keeping an eye on the temp to make sure it didn't rise. Back at the garage, I found that the tank and associated hoses looked good, but coolant was on the plastic 'belly panels' forward of the engine. There's probably a bad hose going to the radiators or heater core. I plan to address that later this week. ...and that's a great opportunity to replace the fuel filter.