panchop

I have been measuring my 75 for the backhalf i am installing. the driveshaft and tranny are offset 2 inches towards the passenger side of the frame. another CF member posted that the pinion was offset 1/2 inch towards the pass side. i can't duplicate that info with a tape measure or documentation. Although i am sure he is correct i would like to see some official documentation of this before i spend $$$ on a 9 inch housing, axels, etc... I have an AIM but can't find anything that addresses the pinion offset in there. anyone know where i can find some documentation like that.
thanks
Greg