This is a 67 A108, converted to V8 auto from a slant six 3 speed
360 Magnum Engine less than 30k miles, compression 175 +/-5, Edelbrock Air Gap, Summit 600cfm, Pertronix Ingitor 2 distributor and coil, 1992 magnum large exhaust manifolds into dual exhaust, front timing cover converted to "A" style, Mopar 6 blade water pump, Bouchillon "A" style pulley set, Derale 17" steel race fan spaced 1" from core, FSR Tug radiator, 16# radiator cap. 727 non lockup transmission with 1500 stall, Ford 9" rear with 3.25 gear set. Engine block was drained and cleaned out, no rust or scale found. Auto-Meter coolant and transmission oil gauges.
Below is what has already been done or currently in place:
Timing set 5* BTDC, already tried 0* and 10* with no change, 700 rpm
Air Fuel is 13.1:1 at idle, max range 10.5:1 to 14.3:1 idle to accel back to idle
Cruise ranges 12.2:1 to 13.5:1 all readings via digital AF Wideband
Vacuum is good and steady, also pressurized the crankcase, no leaks
Coolant system has been pressure tested
Radiator cap has been pressure tested, also tried another tested cap
No oil in coolant
No coolant in oil
Coolant recovery tank in use
Coolant mix is 50/50 (Prestone Green)
Original thermostat was a 195*, current is 180* just delayed the overheating a little
List of fans that have been used:
17" Flex-A-Lite
16" Spal single speed with shroud
16" Cooling Components two speed with full shroud
17" Derale rigid steel race - current fan, also has highest air flow of all the others
Clutch style fan will not fit
Heater bypassed (no heater) hose loops from intake to pump
Tested fixed fans with shroud and without - no changes
Tested all fans with belly pan and without, ran 5* cooler without belly pan
Replaced temp sender, no change to gauge reading.
FSR radiator was originally mounted low like lws67 did, did not like the fill neck lower than the upper hose even though the systems is closed, I have since raised the radiator to regular height, the core is centered to the fan. low or high made no change to the operating temps.
Trans was originally rebuilt with a 2400 stall converter, trans temps were high, now has a 1500 stall, trans temps are down, had no effect on the engine temps.
I have had several lengthy conversations with FSR, Derale, Cooling Components and others, so far been beating my head against a wall, not to mention draining the wallet and skinning a few knuckles.
Welcome any suggestions.