When the Olympians at SCTA awake, and notice the high level of interest in vintage LSR classes (compare this to: how many people are planning to see how fast a small block V8 Camaro can go... for less than $100K?), they might actually carve out a smaller displacement class than the current 325" XO.
The current limits makes only 2 engines competitive: GMC and Buick.
I'd like to see a 250 OHV class (large enough to include 228/236/248, 216/235, de-stroked 261, Ford 215/223.
Dropping it to 200" would make for more entries, but also make the winners very expensive (de-stroked GMC: 4" × 2-5/8")