hardy built several pinto's. dyno, glidden, and g&r all ran hardy pinto's at one point(according to hardy himself). hardy primarily built ladder bar cars. he never did a lot with 4-links. the factory money dried up and he said he couldn't justify the research and testing for the money involved. he told me he built his chassis to flex in certain areas(controlled flex) but with the 500 inch rule the exp of gliddens was flexing in ways(unfavorable) that hadn't been an issue before the rule change. i'll post some pics later of his walls of fame. he built a bunch of funny cars before pro stock existed. i should be seeing him soon as they went deer hunting with one of his toys. he is currently gathering parts for it.
as far as other builders, i didn't see butler mentioned. i think he built some of the earliest 4 links. our capri built in 71-72 was a butler 4-link.