WHAT????? You must have larengitus, Mark!

Barry watch the top radiator hose while you rev the engine. Hit the linkage on the carb and see if the hose collapse. Also check the fluid level in the radiator, may have an air pocket, since the engine is sloped on these cars when setting some times there will be an air pocket. You will have to jack the front end up to purge that air pocket.

Thanks, ebo! I'll check that out!

Any thing for Miss Jackie

1: Seals around/on the raditater support & shroud.
2: Timing retarded too much.
3: Fan clutch(if you still have one).
4: Are you SURE the actual temp is that hot? With a different engine in there now, did they use your original temp sender, or did they have to use a new/different one? I would suggest checking the actual temp with either an infrared gun, or installing a mechanical gauge temporarily.
5: SLOW DOWN!!! (yeah..right!)

Joel, seals were replaced a couple of years ago. After thinking about it, I don't remember hearing the fan come on with the new engine like I did with the old one, so I think that's where we're starting. I talked to Lew today and he wants me to bring it in tomorrow, as he doesn't want to take any chances with the new engine. The temp sending unit is new and was checked. The gauges were all replaced with NOS delco gauges a few years ago. A few weeks ago when it was cool the engine was around 180 degrees.  Lew also thinks that the new thermostat could be sticking, causing a restriction. I have enough miles on it now (350) that he said he could check the carb settings and all. The timing was just set up before I brought it home although it could have changed.

'Lectric fan or fan clutch? 'Lectric fan shouldn't be coming on driving down the road at that speed, anyway.
It do kinda sound like a restriction in the coolant flow, after reading a bit mo. Or....if the 'stat is stuck OPEN, it would allow the coolant to run thru the raditater too fast for it to actually cool it at that speed. If it were stuck closed, it would run hot all the time.
I'm sure the Lewmaster will figure it out.

Fan clutch, Joel, factory set up. You always noticed when it came on with the old engine. But I don't remember if it came on with the new engine or not.

Ya...they're quite noticeable when working at road speeds.....which is why I be wonderin if the thing is really running that hot. The hotter the air blowing thru the rad, the harder the fan clutch should be working to draw more air thru it....
I'd almost bet it ain't really running that hot...but it might be...ya never know.

 I am just speachless about your NEW car. Can't wait to listen to er roar.