Sooo I completely forgot to update this thread.
As I took the bass to the luthier, he confirmed the neck was shot as the truss rod had no action: it would have needed replacement, a kind of expense I wasn't keen on taking for such bass. I went ahead and bought the Fender neck after recieving confirmation about the heel measures, as I thought that once I had an expense, it could have very well been a decent upgrade (mostly because the Fender neck was 40% off).
It wasn't an easy fit after all because the neck heel screw holes had to be moved, and since I decided to keep the Squier tuning machines he kinda fought with the headstock as the holes for the tuning machine trees had to be slightly enlarged.
He complimented the neck quality wise, also telling me that since it hadn't been sitting in a shop with the string tension ruining it in case of lack of care, it would keep very stable and straight. I was scared the finish would be too pale as I love vintage looking necks, but it's got a nice tone while still being not dark and I really appreciate it.
As I played it a few days I deecided I needed a different pickguard, and since I couldn't find what I was looking for I made myself a matte black one.
Here's the bad boy.
All things considered it turned into a really good instrument, the tone is very nice (yet I'm thinking about a pickup upgrade, mostly to kill the hum) and this Fender replacement neck is really awesome. The shape is very chunky yet incredibly comfortable to play.
That's all folks.