350 (69-79) Pose Shift 2 Stage Pac (Fairbanks 31001-2 ) High Performance Offers 2 levels of Performance: 1. Heavy Duty 2. Street & Strip Improves Your Automatic Transmission! Firms up 1-2 and 2-3 shifts Includes oil transfer plate to give the best holding capacity in 3rd gear possible Improves overall performance 1. The Pose Shift 2 Stage Pac's are by far the easiest available way to step up transmission performance. 2. Replaces worn out separator plate with the new special design plate.