Mixing Squier and Standard parts is opening up a can of worms. The stripped screw holes are usually easy to fix, especially in wood. Use tooth picks and wood glue. The trem can probably be repaired and set up. You might consider a Hot Rail. My go to guitar is a an old Japanese Squier. I put a new guardplate, pickups, and electronics on it years ago. The pole pieces don't line up with the strings perfectly on the bridge pickup, but it is centered. Still sounds better than most Strats to my ears. Most suppliers will sell you a pre-wired guard plate with the pickups and electronics installed for just a bit more than the pickup set you choose. That's what l did. It took a little fiddling to make it fit, but once together I haven't touched it for 10 years exceptvto change strings and clean it.
Stage Guitars: '80s Thin line LP Custom, '70 LP Standard, '83 Squier Black Headstock Strat w/ Dan Torres pickups, '59 Black Danelectro DC, sometimes others.
Pedal Board: Nady UHF 10 -> TU2 -> Rocktron Big Crush -> 70s MXR Phase 100 -> Cry Baby -> Bad Monkey -> Early '80s Rat -> Early '80s Ibanez CS 9 -> Ibanez DE 7 -> Behringer Dr 100 Stereo Reverb
Stage amps: '63 Blonde Tremolux w/ two original 2X10 cabinets with a '60 Ampeg Rocket/18 watt VTB Marshall clone/ Epi VJ into a Mashall 1965A