74 dart sport 318 2 to 4 barrel

First pic: Chrysler small block return spring bracket
Second pic: Chrysler 4 bbl 340 small block bracket
Third pic: Edelbrock Chrysler throttle bracket

Study the pics. All these parts are available on eBay, or do a parts wanted search here. There is a process here to collect the correct parts, but well worth it in the end. Update your post, and I can help you walk through it.

Pics of what you are working on, with your progress will help.

PS:You do not need the threaded part from Edelbrock.