Today I went to trace-and-splice in the tail harness from the 78 firebird into the 76 nova. Low and behold -- it just plugged right in, and everything works fine! Well, after I replaced two bulbs, and adjusted the bottom contact on one socket, that is. The nova licence plate light is in the trunk lid, and won't be needed now, so I didn't splice into the harness to wire it back in. Instead, I used the socket to fix the front side lamp, drivers side.