Few things, Some might be suckin eggs but i'll mention them all anyway.
You need a good oil with alot of Zinc and moly. What oil are you using at the moment?
Replace ALL the lifters with a good hydraulic unit.
Make sure the preload on your lifters is correct. 0.02-0.06 if i remember correctly but look it up. If your preload is out you can rub the lobes off. Use this opportunity to ensure your rocker geometry is right. Adjust rocker installed height and pushrod length to suit.
Get a solid lifter too, You can use this to help dial in the cam to make sure you get it spot on.
Make sure you prime the oil pump once the eng is assembled to get oil EVERYWHERE before starting.
Use molybdenum grease http://www.ebay.com....viphx=1&lpid=94 you can get this at supercheap, Or get one of the things labeled "assembly lube" and coat liberally everything during assembly.
Use a good run-in oil. Something like Penrite's run in oil as it has like massive 2500ppm zinc (from memory) and you can also get a zinc supplement from Camtec, rig them up they will probably be able to send the additive with the lifters if you feel so inclined. Add half the bottle of addative. Dont have to worry about glazing the bores as the piston rings are already run in. Run the cam in and drop the oil.
Put something like penrites HPR30 in and the rest of the additive and run for 500km. Drop and commence normal OCI's
I recommend certain Penrite oils for the crossflows but if you already have a favorite oil then just make sure they are FULL zinc. Usually this means it needs to be an Australian developed oil, There are laws mandating low zinc oils in the states as it can damage catalytic converters. Your oil needs to have at least 1200ppm-1500ppm in a full mineral, so call tech support for the oil or google it and ask them the Zinc levels. If they don't disclose the level then dont trust them. No matter how much they say "Its full zinc" or "This oil is good to go"
"Your X has a red book value of 50 cents - but you still love her and can't bear the thought of the 1000+ hours of restoration... being taken by some thoughtless knob who carelessly shits on your world... The value is to the owner." - XFEvil