New to site, new to Mopar overheating issues

If I am reading this right your 340 standard cooling in the far right column and maximum cooling for non A/C are both 1.20:1 ratio. And the standard and maximum cooling for 340 with A/C are both 1.30:1 ratio. I fail to see where your going with this. Your FSM is stating that regular and heavy duty cooling without A/C both have the same identical 1.20:1 pulley ratio, and the regular and heavy duty cooling with A/C both have a different but identical to each other 1.30.1 A/C pulley ratio.

Are you trying to compare this to a 318 pulley ratio? Not sure where your going with this? Plus this is a 73 FSM. You dont know what the pulley ratio on his car is. I know they are at least 67-69. Did the 68-69 340 use the same pulleys as a 68-69 318? If they are a 318 pulley ratio, weather its a 318 or 340 hes still gonna need the 8 vane pump.

This **** is so ******* simple. Yellow rose your making it harder for this guy than it really needs to be. It's either a partially plugged radiator, incorrect or sticking thermostat, or wrong water pump, or a combination of the 3. For most people there is no reason to go crazy with the pulley ratios. I never have on any small or big block cars I ever had. I never had any overheating problems either as long as I had the correct pump, a good thermostat, and a correctly sized and internally clean radiator. Oh I also know hot environments. I live in West Texas it feels like I am living in a ******* roasting pan 4 months out of the year from june thru september. Yesterday when I got in my daily driver to leave work at 3:30pm the outside air temp on the digital display in the dash said it was 110° F.

D's Nuts and Bolts , if you find the pump is incorrect and need a water pump for your cuda, you will have to buy one for a 1970 up 340 because it uses a passenger side outlet. This is what your cuda has in it. Also spec it as an 8 vane non A/C