The WC in its last few years wasn't afraid to put 1 SD45 on a 80 to 130 car ore empty. Train handling was easy: put her in 8 and put your feet up. One time I did have one crap out on me, just stopped loading while I was pulling out of the siding. I had a crossing (and the main) blocked for 2 1/2 hours before a relief engine got to me.
Sounds like you had one hell of a day there Blackdog,
I saw something like this happen once with an older Conrail B40-8 working along on a transfer run with 40 cars the crew crossed from Tack 1 to track 2 and was heading into a small yard. The engion died out after crossing the 7th switch point. 7 Switches blocked counting the double cross over on the main line thankfully it was on a Sunday and traffic was far from the seen and a local crew 5 miles away was able to help out in pushing while a short line operator 50 yards away stoped to help pull the train as well.