Excellent info, gents--very much appreciated!
I was thinking there might be some sizing differences in the troughs, and Jerry confirmed my suspicion. Very well--it's going to be JB Weld for now, and I'll wait for a permanent repair or replacement until things warm up next spring.
Thanks guys!
PS: The good news is, I caught this leak early. I had at least 3, maybe 4 quarts in the oil change pan I slid under the car as soon as I spotted the leak, so I know I did not oil starve the engine--thanks to God for that!
Last edited by Tyler Watts; 12/06/2019 1:51 AM.