Talked at length with Mike Russell at Backdraft Parts in FL. They have an all aluminum thicker core radiator that they sell specificially for the FE application in a BDR. They also suggested to pair the radiator with a 16" nominal 2200 CFM Maradyne fan and BDR's aluminum shroud. That combo would pull over 3000CFM.
BUT....Since I never wanted to deal with the overheating issue again, I purchased a Zirgo 16" nominal
3000 CFM fan from Summit racing, paired it with BDR's radiator/shroud, and it works like a champ. When I flip the fan switch, the car now moves forward
...I consider it my turbo prop
I've been trying to sort this out for a almost a year now and finally got to the heart of the problem....the stock radiator and fan were to small for my 428CJ. Have some fuel system mods in the works...once those are done, I can start racking up the miles..
PM me if you want more details.