Saga continues! Received an explanation from Griffin via the Arizona Attorney General.
This was a full off frame restoration with many parts purchased. Unfortunately, many vendors advertise their parts will fit 65 SF or a C Body when in fact they don't. Interestingly and after the fact, you discover many of them don't even know what a C Body is or that the 64 was a B body that then went to a C Body in 65. Having paid $844 for this radiator and then JEG's telling me to contact Griffin, called ahead while I was on the phone, then gave me a name at Griffin to contact who denied the claim I decided that enough was enough. I contacted the Arizona Attorney General who handles these matters in Arizona who then contacted Griffin. Griffin responded to their inquiry with explaining their reason for denial which included several reasons including 1) the return need to go through JEG's and not them even though it was drop shipped from themselves (which I did and which JEG's as previously stated), 2) It was made in accordance with their (Griffin's drawing), 3) the radiator had been modified because it was polished, 4) the radiator should have been fitted (installed) before it was polished (install the radiator, take it out, polish and then reinstalled) and 5) it could not be resold because it had been modified (interestingly other vendors provide that service for a premium price).
My position on this is that the radiator was advertised as fitting a 65 SF to OEM specifications and it was not. Contrary to Griffin's assertion that it "was built to their drawing." If in fact their drawings were to OEM specifications, one bracket would not be 4 inches and the other would be 3 1/2 inches. My old radiator is an OEM and each bracket was 3 1/2 inches which is further supported from pictures from their own web site! "Exactfit" is what they call this model of radiator! This could easily be verified if they would provide a copy of their drawings to support their assertion. Another issue with the radiator was the holes in the bracket were placed wrong location. However, this is easily overcome and not an show stopper. In reality, either their drawing is wrong, which is doubtful because that error should have been caught a long time ago given they have a part number for this radiator. Most likely, the wrong bracket was welded on to the radiator at which point the radiator has a manufacturing defect. The fact that it was polished was irrelevant because that became part of the installation process when the was defect was discovered.
At no time during my correspondence with Griffin was a resolution offered or was advice offered. Rather, their demeanor was and is, how do we deny this claim and stick the customer. This is an $844 radiator that won't fit anything without being re-manufactured. You pay a premium price for what they advertise as a premium product and one would expect you would get premium service. Obviously not the case with Griffin. Under Arizona process of filing a claim, I have 30 to respond to Griffin's explanation. I will be doing in the next several days.
I am posting this comment with the hope I can help someone else avoid a similar situation.