yea, who knows though really. it's hard to say exactly what it is because cutting contours or filling the trem route are both pretty significant mods. the farthest you can narrow it down with any certainty is one of the following:
heavily modified '71 Music Master
heavily modified '71 Mustang (on the rare chance it came in sonic blue that year)
those are basically what i narrowed it down to also.
unfortunately i love the green paint job so its not coming off anytime soon. so itll be a while till ill ever know. but if that day comes ill be sure to post.
until then this guitar will be know as the Mysterystang!