Thanks. If it turns out I need more radiator, that looks like a good choice without breaking the play budget.
My "no-brand" (it looks just like a Champion) has three rows of smaller tubes and a lot of them. ECP claims that the two 1" tubes cools "substantially" better than a three-row, but I wish they had some BTU and temperature drop numbers to back it up.
I also have the ECP radiator in my Charger
1968 Charger COLD A/C Hilborn EFI 512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim 2020 T/A 392 Stock 11.79 @ 114.5