FWIW you might want to get in touch with ATS. I have seen an A6K in the flesh. S400 with 3" in and out. Very nice peice. The are supposedly casting up a new T4 pedistal for it. Not sure if that is ready yet. With Wade gone it is very hard to get a straight answer from ATS.
John wire up a torque converter switch and unlock the converter at the end of the pull....It works very well