Sounds like a good deal to me. I would jump on it. The 302 castings are good heads for a 318 build. Of course all of this depends on how tired the engine is, but you can't beat $200
I agree, if it's what is claimed then $200 is a deal. The only way to lose on it is if there are lobes missing on the cam and there's a crack straight down the middle of the block, but if the heads are sound then there's your $200.