https://www.motortrend.com/features/lt-engine-swap-obs-chevy-trucks-killer-performance/

Turns out the tailshaft of the Tremec T56 comes from a mid-70’s Ford C6 automatic transmission designed by Borg-Warner. Napa part NOS-16567 and ATP-11424, make sure your vent hose breaths properly.
A detailed analysis from Jeff Smith on how GM changed it’s engine technology for the Gen V
NEW Tremec TKX 5-speed with streamlined case and 8000 rpm shift capability. No Cutting your floor!
AP Revolution Shifter Mechanism – Original 4-speed shift position
Seamless DOM Driveshaft Assembly – Race Balanced, Solid U-Joints
Driveshaft Slip Yoke – Cryogenically hardened steel
X-Factor Cross Member
Transmission Mount – Polyurethane
Pilot Bearing – Stainless rollers, grease pre-pak
Reverse Light Harness – Weatherseal
Speedometer Conversion – Mechanical or Electronic
Shifter Knob
Hardware, Instructions, Warranty
NOTE: Kit does NOT require modifications to tunnel, console or chassis. White Lightning shifter upgrade available.
To watch the build process and see other videos click here: YouTube Channel