Valve job on os valves
Here you go. Flow sheets are in there somewhere.
@MOPAROFFICIAL can probably give you a good "guess" as to what a good valve job will add percentage wise. I don't know why you're trying to be picky. Just do it, because the slant 6 needs all the help it can get. In for a penny in for a pound. lol
I Might Have Found Something Pretty Cool.....