Actually, it stood for "SnyderMan".(Ivan Snyder was the owner of Heroes World)
Thanks! So, I'm guessing Ivan was a tall, lanky guy
I'd say only the inks were Kubert's. The art for all of Snyder's ads, as I recollect, was done by the Kubert school; drawing by students, inks (only) by JK. Maybe Kubert did the odd piece himself, can't recollect.