[Davewjunior]

Searched the forums and have a few ideas now, but most of the problem threads seemed to focus on vapor lock and fuel delivery problems on older Ps.
Cold, it fires right up. When it's hot, the starter engages for about half a turn and then sits, almost like a dead battery (but without the later solenoid "chatter" you'd normally get). Once the car cools down, it fires right up again. Sometimes, I can just hold the key in the "start" position and it'll eventually roll past the initial "starter stall" and crank just fine and start again. CHT sensor? Starter? Oxygen sensor? It has a new battery/alternator (plus coldstarts fine) so I've ruled that out.

Thanks!
Dave