Finding Centerline 72 GTO GM A body to square up rear end

[Mark Yacavone]

Originally Posted by FED 387

supposedly in all GM A-Body cars the engine is installed on the centerline NO offset from the factory --HOWEVER the pinion center was offset 1/2 inch to the passenger side of the vehicle--- not sure but what has been said-- might want to google it see what you can come up with

I thought is was 1 inch but one of the reasons is it centers up the mechanics of the diff
and makes both axles the same length.