Tsunami I.O engine repower question

[bigeasy1]

Similar to the post by want to fish,I'm also looking for a repower.I'm a newbe to the site and posted a few pics of my new Tsunami a few days ago.Thanks all for the kind words.

Anyway,we pulled the engine out this past weekend,which was a 351 ford.We tried starting it before we pulled it just for ha ha's but it wouldn,t fire,maybe because it sat outdoors for the last five years.
I'm going to keep the boat as an I.O. and was thinking of going with a 5.7 GM engine and a Bravo 2 drive.What horsepower would i need to push it at a decent speed?,and should i go carbureated or fuel injection.
I don't have unlimited funds,so i'd like to go with a remanufactured engine and drive if possible.I know that i'm way ahead of myself here,as i have a lot of restoratin work to do,but figured if i found something at a good price,i could buy it and put it aside until needed.
Also i'm very capable of doing the glass work,and all the other mechanicals,electrical etc,but i'm no expert in sterndrives,so i'd like to find someone who could do everything from the sale to the installation.If anyone can share their thoughts and opinions on the best affordable powerplant & drive package,horsepower,and name of a dealer or mechanic,it would be much appreciated.

Also,i'm not sure if the engine i pulled out was winterized but i don't see any visible cracks.It turns over fine,and there was no water in the cylinders.The manifolds are in nice shape,and it has a nice Edlebrock 4bbl marine carb that has hardly any use.I don't want to use this engine and would like to sell it.What would be the best way to sell it EBAY,Want Ads or something else?Here's a pic of the engine.

Thanks guys
John R.