Got the intake and exhaust manifold separated today. No significant damage. I soaked the studs in penetrating oil for a few days then used a putty knife and hammer to loosen them. After I created a big enough gap I used a small chisel and gently tapped it until the manifolds began to pop loose. I was really worried but I got them loose with no serious issues. I also managed to tap out that center stud on the exhaust manifold. The one I had to cut. One less thing I have to pay the machine shop for. Got the other end out of the block safely too.
I got my valve spring lifter tool in the mail today. Used it to remove valves, keepers, and springs. That last valve in the back that I couldn't get unstuck was a BEAR! I had to use a slide hammer to get it out! The valve guide is TOAST. Rusted and pitted badly. Found out why that other valve was sticking too. The guide on that one is CRACKED. So that's two valve guides I need to replace. Anyone have tool number KF-27 valve guide remover/installer? Doubt I'll find an original. Need to look for an approximation though. EBAY maybe.
I also found that a lot of my valve related parts don't match. Some of the exhaust valves are a different type/brand. Also, the two valves that are directly in the center of the block have completely different valve spring bases/holders. They are about twice as thick as all the others and appear to be a two piece part. Anyone know what's up with that? I can get pictures after I clean them up.