In this scenario though, the 51-style neck would have a squared off heel rather than a rounded one like the later Precisions, so would have required a fair bit of work to make them fit. It's a rosewood fingerboard too, so the more likely scenario is a reshaped headstock IMO
This is my bitsa; Fender AVRI 62 neck, Fender MIJ P Bass body refinished in sonic blue nitro, a Creamery pickup, and a mix of Gotoh, Hosco, and Fender hardware. It's very light, coming in at 3-point-nine-something kg.
Not wishing to derail the thread further, but I put a Hosco bridge on a Sonic Blue 60s CV P and 4 of the holes required filling and redrilling. I've yet to find a direct drop in for the Chinese CV bridges.
Pictures of the case as requested. I'm not sure what constitutes a regular Squier, but these were made in the same factory as the original Chinese Classic Vibe range, so is of a similar standard. It's modelled on Freeman's own 70s P Bass and has a hotter pickup than the Classic Vibes had, as well as a separate maple finger board (no skunk stripe).
2011 Squier Matt Freeman Precision Bass in black. Bought from @casapete at the tail end of last year after having been looking for one for a while, but I'm not gelling with it. It's a little heavier than my other basses at 4.4kg which is part of the reason. It's all original and in very good condition; there are a few minor dings and some buckle marks on the rear which haven't broken the finish. Comes with a semi-hard case, and can post if required.
I know Schaller BMLs are straight drop-ins for the Chinese CVs, though I'm not sure if the screw hole positions are different on the Indonesian ones.
https://www.gak.co.uk/en/schaller-bass-machine-head-bml-4l/955224
Mine is just a change of colour scheme. I'd booked it in a while back but the work will be done and paid for in March when the guy doing it has availability.