valve cover clearance

OK, I had this problem with my 440. I had M/T valve covers on and all I had to do was trim the lower 2 fins on the back for them to fit. However, I went to the Mopar Performance valve covers and they are a little higher than the M/T's and they would not go on. Since I do not drive this car except in warm weather, I removed the cage and motor and shortened the case and it fits fine now. The case that the blower motor fits in comes apart in 2 pieces. Split the case and take the inner out and it will give you a couple of inches and you don't even know it was done. You will not have a blower motor but like I said, if you only drive it in good weather, it doesn't matter. I will see if I can post up a pic of the finished motor.