The ones I find myself still thinking about decades later are two: In the middle 1970s I owned a 1967 left-handed P Bass that had been refinished in the red Gibson SG-looking finish, Sounded fabulous, drew looks from the other bassists, and I found I could actually play it left-handed after a bit of mental rewiring (usually just played it right-handed with reversed string order). Loved that thing to death-- had it about three years and then it was stolen. I keep thinking I'll get a Warmoth body with a mahogany top and duplicate it, but there always seems to be another need for the money--
The other one was around that same time-- we were playing a lot in Victoria, BC at an old pub called the Brown Jug (met a girl there that I almost married, narrowest escape of my life, but that as they say is another story). On the other side of the block was a little music store, very convenient to a lot of the local clubs-- and hanging in it was a (probably early-70s from the time frame, this was like 1976) jet black P Bass with matching peghead, that some enterprising individual had taken the low-impedance guts out of a Les Paul Recording model, I think, and shoveled the works into the Precision, very nice pro-looking job-- and since the metal trim on the electronics was gold plated, changed out all the other metal as well, Looked and sounded like 30 million bucks, and was juuuust out of my price range. Since as far as I know the only way to duplicate it would be to sacrifice a Les Paul Recording, it has remained a pipe dream, dammit. I came to the conclusion that the guy who built it must have gotten a Gibson with a neck that went to crap, only reason I could think of to scuttle one, and I have heard of some others with neck issues.