Yeah, pictures are pretty helpful however, those are actually Keystones. Mine is an original 14" ralley rim car and I have a set of '71s to put on it. Other options: 383 Magnum, PS, PDB, rear sway bar, 4-speed, ralley dash. Tell me some options on yours, we might be good references for each other. Right now it has a built up 440 in it but I have the 383 rebuilt and it just needs paint. I see you at least have the remote mirror where I have the most basic of them all and only the driver's side.
Without sanding, well, are you thinking about clamping and heating? Not sure if I'd try that since it might warp something else but it could work. I think I'm going to leave the rivots in now and think I can mask enough stuff off and getting the trim off was a major weight off my shoulders on this one since now I can polish that and not have to tape around it. I'm worried about having a rivot spin and break something while trying to drill it out and part of the reason I wanted to take the buldges out was to help me get the trim off anyway. If you do yours, let me know. However, I wouldn't consider doing mine without coming up with the right rivots first since I try to keep everything very stock looking, but yeah, you probably wouldn't notice but I'd know on mine.
The July 2004 Mopar Collector's guide features what they call an Ultra Rare Citron Yellow (which we both know is offically called Yella) '71 Challenger R/T. It looks just like ours but has a wing, 15" ralleys ugly front bumper guards and the blacked out hood treatment opposite of ours - it's like a 70 hood blackout but the R/T is cut out and is yellow on that car so we got the part they cut out apparently.