1974 sc 20 prop question

[Iriekiley]

Hey All,
I just purchased a used yamaha 200 hpdi for my boat. The sale did not include a prop and I'm looking for a suggestion about the best overall prop set up. Ideal set up which would give me a great, fuel efficient cruising speed, top speed, and early planing. I have not yet mounted the motor and I understand the height can be toyed with as well as the prop. The transom has been raised to 25''. If anyone has run this same setup please let me know what sort of specs would be optimal. I'm trying to get the boat finished and in the water for this season, so anything that will save me time would be highly appreciated!