360 swirlport heads on a 318

I found a hi mi (march of 91) 360 at a local u pick yard. Is there a way to tell if they are swirlport? It has a old TB injection system. If I put these heads on an older 318 will I have trouble adapting an Eddy manifold w a carb to it? If I use these type of heads will I get 10 or more hp on this or what would be a realistic expectation for a stock street motor?
Thanks! Brian