I remember turning on the AC on my RV2 cars, and it was like their 383s were lighting off a Harley.
My rotary-compressor cars (GM stuff) were noticeably smoother in operation.
But for an original car, I wouldn't change it unless I had to use the AC often and for extended periods.
If I had a "driver" car with some other mods, I'd update the AC without regret.
OR -just save the old stuff, and except for car shows, you're fine.
But if the RV2 doesn't bother you & it's not broken, take my opinion with a large dose of salt, as the saying goes...