I know this is about grand prixs, but same car i have the 2005 ss impala. .. i recently bought a z3 turbo kit from zzp. Caught the black Friday deal, i see a lot of post about the transmission. I already have the l67 and will be removing the supercharger rotors and using the intercooler block off plate. Has any one done this swap, also since i already have the 4t65-e hd should i expect trans problems?