Seen some tapes of very poor quality ... apparently either they manipulated the video from the beggining or it was the fault of the tape's ageing - it looked like Benny did well against the Thai guy ... but maybe they simply cut off some parts of the bout.
True problem is that IMHO his style is totally obsolete for nowadays - it was anyhow weird for those days too. Strange combination of boxing and karate kicking with some traces or so to say flavors of Thai. His combinations were successful within his own hands but if followed as such without good knowledge of rhythm breaking will accustom practitioners with bad habits. Due to need to adjust kicking distance with spinning kick from punching range he used a high and rather unstable stance - if taken as such this strategy will kill both balance and power of a regular Oriental rules or Thai rules fighter.
He is great in respect to personal achievements taking into consideration the freshness of the sport in those days ... but with all due respect, what he looks like now is a sorta "evolution niche" = like those peculiar animals of Australia (no offence aussie guys, it's just a comparison) which developed peculiar shapes and styles of life compared to any other mammals due to the isolation of the continent :)))