Thanks for the reply -- it was pretty straight forward, and I got it done in less than hour.
I have worked with natural gas, and LP before, just had not replaced a valve or solenoid on one of my RVs before. In my experience, you should not use teflon tape on gas fittings, as they are designed for a metal to metal seal. I did test for a leak with using soapy water.
I am not sure why this valve was so corroded -- on the outside, and on the inside before the screen.
I was lucky, in that I did not have to modify the mounting bracket.