I always thought the Torker 440 was a great all around manifold, then, a couple months ago, I saw a dyno test, on a fairly mild 440, between the old Torker, and the RPM.
The torker was a couple HP behind, and about 10 pounds of torque behind the RPM, until the torker caught up around 4000, and then passed the RPM, by a few HP, and LBS.
My 440, in my 2.76 geared Magnum, had a 284/284 Mopar cam, 10 to 1, and a Torker. With the stock converter, I could roast the tires at will in second, and still get 15 plus MPG. Cant beat that.