Iv been noticing a M the valve covers in pics on this site I dont think mine has them I'm at work right now but would my 59 or 63 430 valve covers have it? If not y? Does the M stand for Mel?

The "M" stands for Mercury. You wouldn't have that on a Lincoln motor.

Ooooh ok that makes since. But man it looks cool to bad it didn't stand for Mel haha