Some of the big hills brought me down to 55 mph while I pushed 90 mph (4500 + rpm) going down again.
This was the only trip where I had confidence in the engine. I just installed a '69 GT. 1725. I was going to fix the leaking oil before I left which meant removing the radiator so I never did put in coolant. As a result I did the trips which only fresh water in the system and the thermometer barely moved above 80F and it was hot outside.
Also, I just put on new tires on my 14" wires. 14" 175 70's. I can feel now that the front end needs to be tightened.
I did the trip twice without a mishap.
doug