Im having a similar problem. I have a 78 coupe but the drivers side regulator is from a 78 2+2. works fine but I cant get the window crank to mount. the opening in the handle is just a tiny bit smaller than it needs to be. do I have a bum window crank or are these regulators really different? I hate trying to find a regulator if the problem is the crank but the parts catalog says the handles for the coupe and 2+2 are the same part. Any one else had this problem???? someone is willing to sell me a 76 coupe regulator. will this fit my 78?