The manifold that you mentioned (P5153525) is the Edelbrock Performer RPM manifold. Exactly the same manifold, except it says 'Mopar' and 'Wedge', instead of 'Performer RPM'. Many people use the Performer and Performer RPM, and are very pleased with them.

As you can imagine, your satisfaction with a manifold depends on your intended usage, and the total system of manifold, cam, heads, exhaust, and so on. Your Torker 440 is certainly not considered 'junk' by people who race them, where a single-plane performs well - It doesn't start really coming on until after 3500rpm. But, if you're cruising on the street at 1500 or 2000 rpm, you wouldn't be very happy with it. The Mopar manifold you referenced is rated for 1500-6500rpm.

For what it's worth, that Mopar manifold is what I selected, to go with my stock iron heads and .490 lift cam and TTI headers. My car isn't yet running, so I can't give any 'real world' feedback, but the combo was suggested by my engine builder.

-Tom