Something is different.
MY bet is they didn't account for the factory 3 speed/4 speed shifters/handles are mounted FORWARD of the typical tail mounted 4 speed shifters most cars use. I recall something about the way reverse is on the 4 speed Saginaw transmissions and the seat positions. This would necessitate the reason to expand the hole rearward on a standard 4-speed transmission swap.
Maybe the Malibu experts can hop in and support/debunk this theory.
MY bet is they didn't account for the factory 3 speed/4 speed shifters/handles are mounted FORWARD of the typical tail mounted 4 speed shifters most cars use. I recall something about the way reverse is on the 4 speed Saginaw transmissions and the seat positions. This would necessitate the reason to expand the hole rearward on a standard 4-speed transmission swap.
Maybe the Malibu experts can hop in and support/debunk this theory.