Small block coolant bypass hose diameter?

Does anyone else feel that the coolant bypass 340/360 that comes off the front of the intake back into the water pump is too big of a diameter? My previous 340 combo always had a issue running hot. Currently finishing up a 408 stroker off a 360 block. I will be changing alot of things on the coolant system to help improve the temps this time around. I currently have a hi flow Flo-Cooler pump, switching from a aluminum down flow to a aluminum cross flow radiator, and will be purchasing a new eletric fan and shroud combo as soon as I get the motor dropped back in to see how much room I have to work with between the radiator and pulleys. I may also be fabing up some additional shrouds in the grill on the sides of the raditaor to block air from going around any opening I may have on the sides forcing it through the radiator.

I will also need to run a second coolant sensor for my future FAST EFI install and I am all out of usable ports on the intake. So I was thinking of intergrating one into the bypass hose and at the same time possibly reducing the diameter to force more flow through the radiator when the thermostat is open rather than a good portion of it being bypassed.

What do you think?