Re: What pro line model is this?
I think this is probably a Japan only model - there were a few Prolines which were such, namely the PL650 (HSS, basswood body, rosewood fingerboard, no binding, Super 80 bridge pu), which some people call a Proline Jr, as it's the most basic spec'ed model
The only other I've seen similar to this is a bolt-on version, candy apple red finish, HH, but VVT (probably with push-push on the volumes, like Roadstars of the same year), three way switch. Don't know what the model number is though.
As others have said, this one is a refin (originally silver, which was one of the Proline colours in 1986-87), and the front of the body has been recarved with some bevels. They also got rid of the notches on the horns, which are characteristic of the Roadstar/Proline shape.
I'd say the only hardware that's original to the guitar is the bridge - characteristic white gold finish version fitted to the silver guitars –, the jack, and the base of the nut. The rest is all aftermarket.
The neck construction follows the norm for this series - same width as the fingerboard and five piece maple/walnut. Body wings would be alder, I imagine.
Looks like a cool guitar; first time I've seen a neck-through version.