No you don't, even less installed backwards, as the above is. I have seen 4 reversed spoilers in my time.
You gotta hate that! When I was in high school, I had a 1959 TriPower Catalina. The frost plug on the back of the passenger side head started to leak. My mechanic simply cut a hole in the toe board, replaced the frost plug, and welded a patch on the floor. Done!View attachment 1519447
removal of some interior to pull the TKO to prep for engine lift to replace freeze plug
watermelon
1967 Belvedere II Silver Special race car. My buddy, Ross, had one until it went into the wall at about 150 mph. at Norwalk about 5 years ago.