TransGo Gear Command Automatic Transmission Reprogramming Kit - GM TH400 400-1&2 016438NRRS Here is the base plate

Here is the base plate you will need for Walker or K&N car box

the 7AL-3 is the right choice

Inlet & outlet tapped for 3/8" NPT

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TransGo Gear Command Automatic Transmission Reprogramming Kit - GM TH400 400-1&2 016438NRRS Here is the base plateTransGo Gear Command Automatic Transmission Reprogramming Kit GM TH400 Product Description: Automatic Transmission Shift Kit Reprogramming Kit Gear Command Separator Plate Springs Gaskets Hardware GM TH400 From stock type replacement parts to substantial performance upgrades, TransGo offers kits and components to make automatic transmissions shift better, handle more power, and improve reliability. TransGo produces shift kits, reprogramming kits, and