Twinshadows looks nice. On my 54, I have the carb positioned with the primaries in the rear. I used the Ryanstar bracket from Amazon. Its made for the Holley 4150/4160. The 2 return springs definately help to keep the idle speed down and stable. It does make the pedal tight when pressing down on it.
Powerage you have several options. Reach out if you need additional pics or have questions.
