AV gas doesn`t burn valves. It has a high lead content. Therefore valves would be fine because of the lead acting as a lubricant even though with hardenned seats it is not needed. VP red does still exist. Run that with open headders and the underside of your car is orange from lead.
Why run this unless compression is up there? Just asking. I build motors now that will only run on pump gas. Down here VP is not at every street corner and shop.