Gen3 hemi tkx swap

Which TKX trans did you purchase?
If you purchased the the Ford version, it has a 7.21" input shaft length. The GM one has a 6.71" input shaft length. this is the only two transmissions they make, no Mopar lengths.
833 trans have a 8.5" input shaft length, with a 7.3 bellhousing depth both versions of the TKX input shafts are to short for the Quicktime bell you bought.