426 Hemi

Sonny Liston's biggest fights involved losing to a smaller fighter, so that might not be a good analogy:D

Cassius Clay was 'taller' than Sonny.

Cassius Clay ......... 6' 2 3/4"
Sonny Liston ......... 6' 0 1/2"

We're talking about only a few pounds in 1964 {1st Bout}, and 1965 {The 'Dive'} in Lewiston, Maine".

Yes, both Marty Marshall {1956} and Leotis Martin {1969} were smaller
than 'Sonny Boy'.