how hot does it get at 40 mph and above?
are your fans chinese?
how many amps are they?
how wide is your rad?
without the dist vacuum hose connected
what is your initial timing?
what is your timing at at 1600 rom?
what is max timing?
what rpm does it reach max timing?
what brand are your fans?
how far is the engine bored?
is block an old ford or a dart or ford racing?
you likely need factory fans and a bigger rad. the chinese ones like champion hold less water than a us made one.
at the moment i see a big pricey rad in your future like a 20" dual or tripple pass 4 row or 2 rows with 1" tubes and either ford contour fans or the killer mk 7 fan.
if you have a 17" rad it will never ever cool in a month of sundays with an old ford block and ac in 80 degree plus heat.
if the water fittings are on the same side you can relocate one to the opposite side.
you also need a 192 premium stant thermostat or high flow one.
10% anti freeze 90 % water.
1 bottle of water wetter
anode for rad.
if you have an auto trans you can install an external trans cooler.