Actually, 1995 3.1L V6 Lumina still uses adjustable lifters; 1995 3.4L V6 & 1996 and newer has a roller cam / lifters that aren't adjustable. I know, I just finished an intake gasket replacement on mine (1995 w/3.1). You have to remove six pushrods (3 on each side) to get the gasket off / on. The gasket kind of "weaves" around the pushrods on each side.