80 and up are O ring type, officially
79 older are flared normal
i just threw out a billion lines and fittings and hoses, some brand new, you should have said something sooner :/
i might still have the short O ring line, thats the lo side, it uses clamps, unlike hi side
io might hjave hi side entire hose, ill have to check and see what style ends it got,
PM or email me with p/s hoses lines subject and ill check around
thanks