Help! My 318 is choking to death!!

Get an Edelbrock SP2P intake or Offenhauser dual port dual plane intake for that... They have good low end grunt and mid range up to 5000 RPM... Great intakes for trucks and vans for performance and economy...
Great info , I installed a Isky towing cam and the dual port on my 76
Power Wagon 886 ambulance very impressive from just off idle to 3500 rpm .