Thanks for the replies - Here is the good news
Thank you all for the help. First of all my speedometer is perfectly fine - That was replaced. Second, all the guages work, they are just cracked badly.
So really all I want to do is replace because they are all cracked and look terrible. I just did not know how to match up aftermarket (Do I just call and tell them the year and model of the mastercraft - they then ship me the aftermarket guages that will match up?
I do plan to have a technician replace them ( I am too worried about messing something up)
Do I have to worry about the odometer due it having the digital hour counter?)