Let's see what the "free PVC" cost me:
New repop hatch (bare) $390.00 [plus road trip to Corona,Cal]
Window Gasket $45
Hatch Weatherseal $30
Hatch Grommets $20
Glass Install Labor $20
Used '69 interior lock mechanism. L & R Relay Rods, R & L Latches $50 [plus road trip to SF]
Looks like five and a half, at least, not counting beer for bribing buddies, numerous trips to the weird parts section at ace hardware and assorted jesus clips from checker auto.
I was able to re-use my vintage rear window (w/Semper Fi decal and US Flag still attached) so that saved me at least $80. Also the knob and lock tumbler shaft were reusable.
Satisfaction at hearing my catches pop open right: Priceless.
Incidently, since the tops were considered an "Auxiliary" RPO by GM they had a different Key than the Doors/Ignition locksets.
A locksmith could change it out for you, so all keys are the same, I guess. And if I didn't want to screw the pooch, I would take it to a pro if I had no key.
Funny, I remember when the GM glovebox key to my 68 pickup used to work on the forklift at work, til they changed it out!!