Did you use pre-formed fuel lines? If so, did you use compressed air to remove the media from the lines? And did you check closely for kinks in the line or places it may have gotten pinched?
Along with the suggestions above...
It doesn't take much fuel to idle, so you may have unrelated issues. Check that the distributor is not loose, that the cap is on square and tight, etc.
Vikki 1969 Goldenrod Yellow / black 400 convertible numbers matching
