Need some advice on cracked heads
I'm a bit lost and need some advice. My car is a 2002 Park Avenue (base NA model) that I inherited from my grandfather. At first I didn't think I wanted to drive it, but it'* a great car. It also has sentimental value.
It now has about 120k miles on it and has had the upper intake fail. I thought I had gotten to it soon enough, but after taking the heads to a local machine shop, there are cracks between the intake and exhaust valves in 3 places.
I'm not sure what to do at this point. I was thinking about buying a crate engine, but sure I can afford it. I'm worried that since the heads got hot enough to crack that there might be other damage to the crank or cam bearings. I do have an engine hoist and can remove and rebuild it and get re-manufactured heads, but by the time I'm done it sounds like it'* close to the price of getting a rebuilt tall block.
Should I be this worried about pulling the block out? Is it worth it to just get a rebuilt? Even if I decide to rebuild it myself, should I have the crank polished, or does that depend on what it looks like? Ohhhh, I'm so confused!
Any advice would be greatly appreciated.