Way back in the darkness of this thread, I commented on the lube or lack of,on the cams in my 400.
I had pulled a couple of lifters on #1 cyl and they were dry and showing signs of wear! This is on a low time engine.
I took out a lifter that was just below the crankshaft centerline and through a top lifter I injected gear oil, (80-90 weight) until it ran out of the aformentioned lower lifter.
From then on, after a flight there was grease/oil residue around the lifters, so obviously receiving some lube.
I had the 400 in a 40% Waco and put many flights on it, it has been sold on and is currently living in Texas.
Cheers,
Dave.