Well anything that didn't carry radar was hardly going to be an effective night fighter. The P-38M would have been a fine nightfighter if it had seen action (aopparenlty a few enter service just before the war ended but I don't know of any interceptions). There were some field modified P-38s that got into service down in the South Pacific. Two of the machine guns were moved forward and a radar set was squeezed in between the cockpit and the guns. Again, I don't know of any interceptions they actually made.