The stock mirrors on my truck are kinda weird. Flat instead of slightly convext? They seem to provide very little viewing area for their average size.
Replacements seem to be iffy to google for, as it looks like there's a body year change at '97/98, with some '97s having the newer style body and mirror? Mine's an F-250HD, which seems to actually be slightly more meaningful and odd than I'd have thought. Also, the later ones apparently have some trucks on 7-lug wheels (!?). Which is irrelevant to mirrors, but straaaaange.
Anyhow, I'd like better mirrors that just fit the stock mounting points, but mostly I'm hoping that someone with the same era truck as me (and this appears to be nominally '92-'96, despite mine being a '97... ) has upgraded their mirrors and can say "You want these ones!"