My work car has done 500,000k with no engine work at all, just 10,000k
oil filter changes and the usual plugs etc, I drive it just as hard as when I first did.
New engine manually prime
oil pump until
oil come out of ALL pushrods/rockers before turning crankshaft over.
I am dry sump so after I re-prime my engine since the dyno work, I will heat my oil tank and start it normally. If several weeks elapse between startups I may hand prime the system with external oil pump, but I dont really think there is an issue if you use a good quality oil as there should be still plenty on the bearings etc.