While lashing the valves AGAIN tonight chasing a rough running under load issue, I noticed that the passenger side head drips more oil at the back. Actually it gushes more than the drivers side.
I wedge cardboard around the bottom and up the sides of the head by jamming it down between the springs and rail which works great, but every time I do, I get a puddle of oil on the ground at the back on the passenger side only. (I know... cut some old valve covers instead)

I'm just curious why it's the passenger side that does this. Is it just inherent to a GM small block? Is it a negative thing, or could it just be a coincidence?

Could be the oil plug at the rear of the block on the driver's side may be screwed in too far, but it would really have to be too far.

So I should get the same amount puddling in both heads? I don't have a starvation issue on the drivers side by any means... just not nearly as much puddling as the passenger side.