[everettelane]

Welcome to the forum, that is a nice truck. I agree with Jocko i would definitely check the timing. If it is to far advanced it could cause the issues you are describing, also probably could check the thermostat it could be sticking open and not allowing the coolant to cool properly.I was just noticing the shroud is setting pretty far from the radiator you could be pulling to much air around the radiator and not through it at idle is when you would notice the temp but driving the air is forced through the radiator.