Bill.. I have heard of guys running .100 wall.. myself
I would like .120 or better.. its real hard to find a
factory production block with better than .120 when its
cleaned up
EDIT
my mega block had .200 on basically all cylinders with
a 4.5 bore(I wasnt going 4.5 but I did have it sonic
checked... 64 readings per cyl... that was $75)