Dude, I've got all the tools to do the valve stem seals and such if the heads are in decent condition. With that mileage, they SHOULD be, but with not a lot of info on previous maintenance it's hard to be 100% sure. Compression test will give you a good idea, and I've got the tools for that also. The Clearwater heads are nice, (I had an issue with them, but they finally made it right) for the money, but you can save many hundreds just doing the valve stem seals, and all the basic maintenance stuff. There are a bunch of locals out here that can steer you in the right direction if you need help.