[FWB]

normal temp, in summer should vary from 180-200. i would be worried if it gets over 210 sitting in traffic. the temp rating of the thermostat is when it opens, not what temp the motor will run at. a 180 deg thermstat should work fine. the problem with the air flow is usually the distance the air needs to move to get to the radiator. it takes quite alot of cfm to draw from the grill opening. i have a 3300 cfm puller and it seems to be ok with a 7 core aluminum rad, and shrouding. however i currently have a 160 deg thermostat in mine with 3 small holes drilled in it. i am going to change back to a 180 with no holes drilled. on the highway it runs too cool. 140-160. in town with 90 deg weather i'm at 195-200, which i can live with.

fred

note: octane boost ie: lead additive will help the in town cooling. maybe by as much as 10 deg.