We extend to you a cordial "WELCOME ABOARD !" Come on in, make yourself at home, we are a friendly group of enthusiasts, and we also appreciate the classic Chris Craft Roamer, Corsair, and Lancer boats too , as they are all on the same family tree and share much in common !
Well it depends do you have the P34 Paragons? if so they are 2.50 to 1 reduction and my props are 20 by 22 3 blades which were stock but I am heavier than your boat. I have the aft cabin which weighs around 17500 lbs the express is in the 14's if I remember right. I know Tim Toth's 35 express with 427's spins 22x26 3 blades but his are custom tuned. So not sure what to tell you I would think you could go 22 x 22 or 24 if you have the hp. You didnt say what hp you have or I missed it. If you have around 235 hp like I do I would think my guess is pretty close. If you have newer SBC's with close to 300 hp you may want to look at something else I would think the 22x24 would be a better fit then. If you go to 4 blades everything changes talk to a prop shop they can help so will Michigan wheel if you send them your specs.