What is the best overall prop for my boat?

[moneyhole]

I finally found an affordable, complete used outdrive I'm going to look at tomorrow and hopefully come home with. It is an Alpha l. I have a 1977 V-20 cuddy with an in-line 6 cylinder. I will mainly use the boat for fishing and some pleasure riding with the wife. What would be the best prop size/pitch to use on this boat. I would like to get up on plane quicker and not worry as much about top speed. Thanks again for ya'lls help.