Comp cams xe268h for 318

In all honesty the rusty bores is my fault chalk it up to a learning experience. I was thinking thinking and I figured it out I know what happened. This engine was in a every day driver it ran good I drove it for a while before pulling the engine and then it sat inside full of oil covered for 7 years. Well when I got it out started cleaning it and stripping it before I started I sprayed it down with degreaser and a pressure washer. I had spark plugs in it to make sure no water got it the bores but I forgot about the intake I better water went down in the intake then after a cleaned it I pulled everything off intake timing cover / chain cam every thing but the heads. If I will have pulled the heads the same day I could have seen it and dried it. That explains why it's only a couple cylinders that are rusted. The ones the valves was open on when I sprayed then I pulled the cam and they all closed and it couldn't dry it was just stuck in there. That is why it looks like new rust. If you look you can still see moisture in the bores.