TA sells a thicker gasket because the the front connecting rods get very close to the bottom of the pan. If you have a slight dent, it can hit a little. It happens every so often leading to lots of anxiety. The thicker gasket gives a little more clearance. I would get that one. Other than that, it doesn't matter. https://v8buick.com/index.php?threads/455-knocking-from-pan.358316/#post-3074549
Yeah. I thought I had a bad #2 on after break-in. "Knock knock..." "Who's there?" "Number two." "Oh, crap!" "