My 434" small block made 30 more hp on pump 93 than on Crate 98 race gas. All the tuning on the dyno was done with the 98. We pumped out the fuel cell and drained the carb then put in the 93, started it and allowed it to warm up, then made the pulls on 93. I've ran it on 110 unleaded gas too, the afr's were good but it didn't run the numbers that 93 does.

It's 11.2-1 with a 263/271° @ .050", .711/.719" solid roller.