So it seems with proper gearing and making sure the engine breathes well and isn't being overworked, a 292 can get okay mileage. Basically what I am trying to accomplish with my 292, to get efficient power out of it.

292 1966; 3962084 T6G2 Lumped 250 Head 1.94/1.60 gasket matched, mildly ported. LOWEBOY