I should premise this with the fact that while I have Doctor friends i don’t have doctor money. So I know I could get almost anything made.
Rascal Bass like the squire one with humbuckers, but a 34 scale length?
I don’t really have a need or use for a short scale. So…the knly other thing being.
Could I just convert one to 34?
You could either:
1] install a new, 34" scale neck (may involve non-trivial work done to the neck heel, pocket or both); now,
1a1) with a 22-fret or a
1a2) 24-fret neck, you would not have to move the bridge (the amount of adjustment available, due to the significant length of the bridge plate, would take care of the final placement of the saddles in either case; in the latter, though, you may need longer screws for the D and G string saddles unless you use stiff flatwounds);
1b) with a 21- or 20-fret replacement long-scale neck, you will instead have to move the bridge backward ( = away from the neck and toward the edge of the body);
2] keep the neck, replace the fretboard with a custom-made, 34" scale one.
In this case, you would both have to move the bridge quite a ways back, and resign to having just 17 frets at your disposal (or 18, with a fretboard overhang), unless you also move the front pickup.
Speaking of pickups, and assuming you do not move them: in this case (same neck, new board, bridge moved 3.7" toward the butt of the bass), their placement relative to the scale would now be *very* different, with the rear pickup roughly in mudbucker (virtual 24-fret) position, and the front one at a super-duper-deeper position (think adding an end-of-fretboard floating pickup to a parlour acoustic guitar).
