i too have a 352 with bored .60 over with a .530 lift .280 dutation cam forged 10:1 pistons edelbrock intake and headers my motor is the coolest running car i have i have never seen it go over 200 usually on a hot day like today down here in georgia it will idle around 160 to 170 i put a 160 thermostat in it and it made all the difference