Ah, so the GF body size is a grand concert or maybe even a grand auditorium sized guitar, and the JF body size is a jumbo? I’d read somewhere Guild used F to stand for folk guitars, so maybe JF is jumbo folk and GF is grand concert folk? But now their new jumbo designation is just F. I love these guitars, but some of their naming criteria makes following along a bit tough.
Seeing that album takes be back to delivering furniture in Lawrence , KS in the early 90s, listening to 61 Country, (AM 610). This Cowboy's Hat... great tune, "then a husky fellow said I think I'll rip that hat right off your head/ My friend turned to him, and this is what he said...."