It might work, or it may not, but those adapter kits...I'd shy away from them if possible. They have been known to blow out. Not saying it would, just saying it's happened. Maybe it has something to do with the installer, but...
If'n it were me, I'd get a used Camaro style hose setup like was mentioned, then cut the hose compressor mounting section off of it and have it grafted to your Oldsmobile hoses. It'll fit like factory and you'll get to use the stepped 134a compressor.
Never was a fan of those washers.