What oil, What weight?

I am using kendalls 20 -50 racing oil, from before they were bought out, lucky, i had bought a bunch just before they sold out . most all of the racing oils have the zink added to them ,either in 10-30 and 20-50... weights will do.
watch your oil pressure spinning a engine that high,,,,rule of thumb there is 10 lbs per 1000 rpms.....hope you have a well thought out oiling system.