3.9 high-stall converter behind a 318?

Well then... I'm surprised your question wasn't "is Factory High stall too much?" Lol

She's gonna love it.
Well, you aren't wrong, that was really my biggest concern. My math says RPMs will be a hair over 2k at 60, so I'm thinking having the stall speed below that would be a good thing. Less heat generated, etc? It's a lockup T/C, but I'll have to dial in the manual control of it (no computer).