My thoughts on a 292 rod is one long enough to use forged SBC pistons, and to get the compression up, like on a 250. A custom set of Ross or Arias piston are expensive. If something goes wrong in the motor and it requires reboring, it's another set of custom piston at $500-600. If that money was put into a good set of long rods, they are reusable, and oversize pistons half the cost. How many potential Inliners have walked away from building a performance 292 because of cost. Land speed records and quick 1/4 mile times are great, but not every one wants to do that. We need more hot inlines on the street.
Sorry about being on the soap box.
Larry