here what I have a 250 40 over with dish top pistons with a 194 head, 499 lift 268 cam, 650 double pump dual line 4 barrel carb, dual point dis. headers dual exhaust and M21 4 speed, 373 pos. The problem that I have is it wounts to run at 210 to 230 degrees at idle. put new water pump new raditor and 180 degrees ther. flushed system out with super flush. just started doing this after old raditor busted and put new raditor in. have two very big electric fans on the raditor. if I drive it it runs about 205 degrees. needed it down around 180 to 195 degrees so it will run it best. dyno tested a few years ago and at rear tire making 165HP and 202FTlb of torque in fourth gear. Not bad for a engine that was rebuild al most 15 years at time of dyno test. now the engine is 18 years old. check the compresson cold and it makes about 155 to 165 psi. the raditor is for a 1966 big block truck. looking for something to do to it.
