QuickTime 8020 will not work on ls6 t56 magnum combo

[frankv11]

Got a 2005 ctsv ls6 ( that came w 6spd manual trans / t56), t56 magnum and the QuickTime bellhousing 8020. Apparently 8020 is 5.5" deep and input shaft sticks out approximately 1" and does not allow BH to mate to engine block, it pivots on pilot baring. Is there a difference on stock LS automatic vs stock LS stick shift tail end of crank as far as how much it protrudes from engine block. Ctsv t56 bellhousing was 5.750" deep w .200" of the input shaft sticking out. Big difference from what the 8020 is giving me. Do I have to use spacer between trans and BH? Or does QT make other bellhousing for my application?