Can I use B or C body manifolds fore better flow on my sleeper GTS?

I wonder if a guy could hack up a truck manifold for the long outlet and mill both the manifold and outlet to make the correct exit angle? I have been keen on experimenting with iron MIG wire for some time now.

My biggest fear is having to modfy the geometry of the z-bar. I dont like changong the geometry of that system because it causes various problems, especially power shifting it. A crooked z bar is not an acceptable solution to me. If the z bar is crooked it will bind up the linkage under the dash and things start wearing and fail. They bb a body only 7/16" clutch p/rod is getting hard to find. If this project continues to spiral out of control I might use a spare pedal assy and hiem joint the clutch linkage to take out the factory engineered slop. Both of my Chargers are done that way if it makes a world of difference IMO.

How about a few pictures for inspirational purposes

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