My 505 is bushed with BHJ bushings and was honed to size for the Comp-AMC EDM lifters.
I did nitride the cam as well.
Think like a .030 hole to lube the lifter.

It's been running since 2012 with a .600 flat tappet since then.

I have over 5,000 street miles, highway, idling in 90*+ weather.
I weekly bracket race with it as well.
And something around 100 passes going 11.'0s @ 120-121

Have fun !