I would have to agree. 200 is not hot. Both my 383 bee runs and idles here as well as my good friends 318 satellite. The factory built alot of these cars with 195 t stats (including mine) anyways so i can't believe that 5 extra degrees qualifies as hot.

I'm not sying that your not expereincing problems. I just think that something fuel or ignition specific is happening. I have heard of ignition wires doing wiered things when warmed up...the wire has a break that when it heats up and expands the contacts pull apart. when it cools down it works fine.