[COPO]

L-78's certainly came with M-20 trans as well. I formally owned a documented '69 SS L-78 convertible that Charley Lillard previously owned as well. The trans was an M-20 and original to the car. The car also had a buildsheet confirming it was an M-20. I currently have a documented L-78 Pace car with the original M-20 as well. I think M-20's in L-78's are not that uncommon.