Before installing it on Snow, @71Polara383 evaluated my radiator on Elvira, his 1970 T-code 'vert that currently has a newly souped up 440. He felt that the cooling was not great during his summer drive to Carlisle. His experience was different from that of @Trace 300 Hurst, who has had only good things to say about the Spectra on his 300 Hurst in Florida weather.
Correct about my experience. Never exceeds 195 with the AC on, in traffic or on the road, with 33* total timing w/ full vacuum advance. But let me add what we all already know: The radiator is only one part of a system where all parts must work. In my case the REST of the system is perfect. Flushed block, new 'stat and housing, new hoses, good (correct) pump, and a Tony's fan and clutch. https://www.tonysparts.com/