On iron heads I used to set intake .002 loose and exhaust .004 loose (never went .028/.032 on anything .022/.024 is lots hot even on them old tech cams).
On my Indy heads (taller than eddies and grow more) I go .010 tight intake and .008 tight exhaust seem to be right hot?? on eddies I go .006 and .004 tight cold!!
a few thou one way or another does little as ling as there is .012 or more play hot!!