J. Mummert stated in his Y-Block Porting articles that he does not like to relieve all the way to the gasket surface when unshrouding, as the "G" chamber overhangs the block least, thus not canceling the benefit over more open chamber models. It's a bit unclear if he was referring strictly to loss of compression by relieving all the way (which would obviously remove more material), or is there some other factor in play re: "block overhang" that I'm just not getting (assuming no material is removed outside the gasket line)?

6 VOLTS/POS. GRD. NW INDIANA