Did the 71 w30 with the Sport Mirrors have CONVEX or FLAT glass on the RH side. Did they update to CONVEX in later yrs with the same Sport Mirrors?
I c their selling CONVEX with or without writing for 71-77

 

The mirror for the 71/72 Cutlass/442 is the same shape as the 70-81 Camaro/Firebird. I think around 75 or 76 they went to a convex mirror with the “Objects in the mirror are closer than they appear” text. Yous should be flat with no text.

 

The 71-72 sport mirror had flat glass and you can't see **** out of it.

 

But if you're not maintaining a #s matching status, you CAN directly swap in a pair of 80's era G-body door mirrors so that you have the right door convex and left door remote. That's what I did on my '72 ragtop and the convex is much more useful.

 

As noted, the convex passenger side mirror glass didn't exist until the mid-70s. Note that while the 1970s-vintage GM sport mirrors look similar, there are a large number of different bases depending on the application. As installed, the heads should be square to the ground and not angled inward. That's a sure way to tell if the wrong mirrors are installed on a car.