Hey Guys 1992 f150 with 5.0 I put in copper core plugs and gapped them at 0.044 is this correct when I go to replace the plugs the computer shows short thread and my engine will only take the long thread, does anyone know the correct plug to install

 

I'm not sure of the exact plug number. Any Napa store should be able to get it- try their online source too. The plug gap for most HEI type of ignitions is .044" to .045".

 

Motorcraft SP450 or Autolite 25 should work.