The confusion I have is I found many specs for a stock 340 cam of .429/.444 lift with duration 268/276. If this is the case, then the above cam isn't stock "O.E.M. replacement".
Mopar Performance P4452782AE
Part Number: 312-P4452782AE
Purple Shaft Hydraulic Camshaft & Lifter Kit
- Chrysler 273, 318, 340, 360
- Advertised Duration: 268°/276°