need info on radiator cap,tstat for sbc with older heater core

[sdvratrod]

Im running a sbc with small cam, aluminum intake, edelbrock performer carb and headers. For my cooling system i have a aluminum radiator,electric fan, overflow can, new water pump, 16lb radiator cap, and a unknown tstat that was already on the motor.

Im running a old heater core for my heater that doesnt leak but ive read that with a higher pressure cap it will eventually cause it to leak since they were only designed to run with a lower pressure like 7-8lb. So my concern is if i put a 8lb cap it will overflow more coolant more often and ill be having to fill my radiator frequiently. The truck runs around 210 at idle sometimes and when i hit the fan switch itll keep it around 185 at idle. Would it help to put a 160deg tstat in it as well to keep it running a little cooler?