Just a quick update. After further checking, the male fitting on the T (the end that threads into the block) seems to have tapered threads. It just seems kind of strange that the male threads on the T would be tapered, and the female threads (where the hose connects) would not be tapered.

1938 Chevy 1/2-ton
More info in the Gallery Forum
She looks good at 50 yards, and 35 miles per hour, on a dark night.