Sorry brother. That P4452761AE cam is the recommended high performance replacement cam for the 340. Only valve lifts are similar and that's it.
OE 340 cam...... Int. / Exh. .... Lift..............overlap .... C-line
P4452782 ----- 268/276 --- .429/.444 ----- 44 ---------- 114
P4452761 ------ 268/272 --- .450/.455 ---- 50 --------- 110
While the advertised numbers look similar, the @.050 numbers show the spread and how dociles the OE cam is.
OE 340 cam ..... 208/214 @.050
4452761 cam ... 228/231 @.050
Writen by an actual smart fella, not an internet hero.
http://victorylibrary.com/mopar/mpcam-tech-c.htm