Ok....here we go AGAIN!!! Looking for a 340 CAMSHAFT

I have the MP cam below in the 360 in my Challenger. It's a little more than stock, hits a good lick at idle, idles well in gear with the J converter. I drove the car to FL and back a few years ago, and it averaged 20 mpg with 3.23 gears. I have had one in a 340 also, and it performed pretty much the same.
Mopar Performance Purple Camshaft Kits P4452761AE