Do a compression and leak-down first to determine the condition of your engine, that should tell you how far you need to go. Don’t bother with an oil analysis at this time as it won’t tell you anything useful, start at your first oil change after your rebuild and then every oil change thereafter. That way you’ll have a baseline and can spot any changes. Btw I use Blackstone for the oil analysis on all my cars. Regardless all that if the engines coming out for a reseal and the head is coming off, you should really do the rod bearings, skim the head and fit new valve guide seals at the very least wyit.
