Thank you all for your opinions - it seems the "without" crowd is in the lead. I have to agree; without the overriders it's just so much more pure in terms of design, with that strong horizontal across the front and back.
I always find it fascinating digging deeper into the recesses of my car... it's kind of like an archeological expedition, getting closer to the guys who built it half a century ago. After removing the bumpers and overriders this weekend, I discovered something interesting: the holes for the overriders were not round, as in, they were cut without using a drill. How, I'm not sure, maybe with some kind of nipping tool. At one point I was thinking that I could rechrome the bumpers and leave the holes, in case I changed my mind about the overriders. Now that I've seen the (really ugly) out-of-round holes I think I'll have them filled in by the plating people. And to one of the posters, yes there was some localized distortion of the metal, probably due to tightening of the bolts holding them on.
Perhaps I'll sell the overriders to help pay for the rechroming. Any idea what they'd fetch?
Anyway, thanks again for all your thoughts!
Kris