Well, look at it like this, my twins are 64 over 80 and I don't change a thing from daily driving to towing to track except the tires.
With my little 37 lpm injectors and normal driving, I'm making 6 - 8 psi of boost at 1600 rpm's.
Hook any of the trailers up and boost is instant. It likes having the extra load on the motor vs unloaded. Towing the flat bed (3700 lbs) with another truck (6800 lbs) on it, cruising at 80 mph and I'll be sitting at 14 - 16 psi and 850*.