Originally Posted by 6bblgt
1969 big block Darts use a 7-blade 18" diameter 1-1/2" pitched fixed fan - #2863213
replace it with the 7-blade 18" diameter 2" pitched fixed fan - #2863224 (same as used on a Superbird to increase air flow)

replace your 160 thermostat with a 180 unit - once you reach 160 your thermostat is wide open and never slows the flow of water thru the radiator where it would have a chance to cool

do you have a shroud - do you use antifreeze - do you use water wetter? luck yes, yes, yes

where is your timing?


Changing to a 180 thermostat won’t do anything. The last thing you want to do is keep the coolant in the radiator longer. OP, what do you have for a water pump? Is the water pump turning faster than crank speed? It should be. A 22 inch core is pretty small to cool a big block. You would have been better off with two .75 cores than three .50 cores.

Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston