Cam Operating Range & Highway Driveability

Whats that like in a 35 or 45 mph zone ? Even with OD off...

Yea, what's funny about that is when I was building my automatic shifting system I test drove it with only the manual on/off switch.
I could idle on the cam lope at 35mph in OD.:D

But to answer your question, it kinda sucks around town and in 45mph zones if it was on.
With the automatic shifting system I built, it only goes into OD when it reaches 60mph and lockup at 75 or so, but I usually just keep OD and lockup both turned off manually unless I'm out on the hiway.
I have everything adjusted where it tends to keep the motor in the 2,100 to 2,500rpm range in normal driving conditions all the way up to 100mph if OD and lockup are in full automatic mode.