I picked up a 76 comet that came with a 73 4 door parts car. I have seen all the advice online for bumper swaps but all are for 70-72. I know the 73 is a less desirable but it was included so I am going to use it. I need to replace the quarter extensions, the 4 door ones don't fit. Will the 70-72 2 door ones work, or do I need 73?