Depends on your budget.
If you want to get away with (almost) no work to the crank (stock rod journal size) you need the exact journal OD and the same or slightly less width. That's a short list for both.
if you can stand and afford to have the crank ground undersize, the choices expand quite a bit, but how fragile the crank is with the lower journal overlap is tough to predict. The 292 is already at a point that would look dangerous in another engine:
Journal overlap = (Main OD + Rod OD - Stroke length) ÷ 2
For the 292: 2.30 + 2.10 - 4.12 = .140".
The slant 6 with a similar stroke:
2.75 + 2.1875 - 4.125 = .406"
If you go down to 2.0625" you can use a Plymouth 218/Dodge 230 flathead rod: 7.9375" long (don't know the width). I wouldn't try to put too much power through it, but they certainly beat them up back in the day.
No offset:
2.30 + 2.0625 - 4.12 = .121"
Dropping to 2.00" journal adds to the last, but how strong is it?
If you can afford to weld the crank, the sky's the limit - just use a BBC rod.
The larger stovebolt and GMC journal allows anything below 2.31" to be used, with the same problems.
The Chrysler/DeSoto rods have 2.125" journals and lengths from 7.75" to 8".
The Buick L8 263 is 2.125" × 7.375".
The Buick L8 320 is 2.25" × 8.25".
The Olds 1957-58 371 rod is 7.00" × 2.25"
