318 rebuild for d200

I did the tear down on my engine and the block looks to be solid so I'm just gonna stick with the 318. I ran into a little problem when taking valve springs off. The outer port where the spring sits is cracked. I was wondering if anyone had the same problem. Do I need to get a new set of heads or is this something that could be repaired?

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For your application, it doesn't matter to the guide, but if it extends into where the seal clamps, then I suppose you could have a leaker.
The machine shop will check the guides for wear, and tell you what needs to be done.