Many thanks to LeathermanXXX (if that is his real name) for this amazing response to my query:
The model's porn name was "David Dude". He modeled for the now-defunct Sunblazer Studios in 1982-1983 (Tex Murdock also modeled for them around the same time after he left Fox Studios). After the success of his Torso cover, he also did one porn video in 1984 called "Centerfold Spread" for a company called Shotgun. (It was only available on VHS, never released on dvd). It was advertised heavily in Torso but the company never took off. Sunblazer Studios went out of business but was relaunched under the names Hunk Studios and Cordean Studios in the late 80s-early 90s but folded once again around 1993. This guy has been my all-time favorite model ever since. I always wondered why he's never received much attention on the internet before. Thanks for letting me know I am not the only one to remember him
I was only able to find the following low quality stills from the movie :( UPDATE