I can tell you right now, the 88 Diplomat does not have a power steering high pressure AC cutout switch. Got one of those in my yard right now. It has a refrigerant low pressure cutout switch mounted on the "H" valve.
I don't know much, but I know the speed limit where I'm at on I-40 is 75, and 90 mph is common. I also know it's hot in Arizona.
I don't think I'd wanna run 3500 rpm with the a/c on in 112°f weather.
