Sure hope those low compression heads can run the "pump gas" supplied by the on sight fuel truck. Shouldn't be a problem, it will be 92 octane! Please don't bother to "fill up" at the local mobil, if you do, we can run it in my motor home--Div. I boats will run the 92 octane provided at race site. That is, if we get the 35 entries necessary to run the race. Rod