I went through the same issue with my '74 Dart.
Save yourself some time and aggrevation:
First test is remove the
Gas Tank side of your
Fuel Pump put a piece of
Soft Fuel Line from it into a jug of gas and fire it up. If it runs the clog is from there back. If it does not it is probably the
Fuel Pump/Filter.
If it is from the
Pump to the
Tank:
Drain the
Gas Tank,
remove the
Sending Unit, check it for flow,
then while it is still removed at the
Sending Unit, remove the other end of your
Hard Fuel Line from the
Fuel Pump, Check for flow from front to rear (I used air to blow the crap outta mine). IF there is a lotta gunk in the
Sending Unit it would be wise at this time to drop the
Gas Tank and clean it out too.
I know it sounds like a lotta work but it is worth it to have confidence in your
Fuel System!
Here is the thread on my '74 Dart:
http://www.forabodiesonly.com/mopar/showthread.php?t=43689
Hope this helps,
Later,
Bruce B.