1) is your engine running well? If it is, why change it.
2) What do you mean by " double feed"? Is it a " double pumper"?...or does it have vacuum secondaries? ...with
dual fuel inlets(front/rear)?

If it's a double pumper, it's force feeding your engine fuel when you stomp the accelerator. If it has vacuum secondaries, the engine will pull what it needs. Depending on model, You can adjust with jets and springs.

While I agree the Qjet is the way to go for a cruiser, I have had good luck with the Edelbrock ... If you're looking for a "decent" running street cruiser.

Now, performance is a whole nudda' thing! 😉😎