You need a valve spring compressor to remove the valves. People have posted about using an altered C clamp, but a valve spring compressor is quicker and easier.

I works by holding the valve closed while compressing the spring. You can then remove the two keepers and slowly release the compressed spring. Keep the components for each valve assembly together to be reinstalled. Don't mix components from one valve to another.

Be careful installing the cam. I always start with the cam in a position where the lobes on #1 allow both valves on that cylinder to be closed.

Just get the nuts started on all the bearing caps and then give each nut a full turn in sequence. This brings the cam into position more or less equally along it length. Bringing it down too much in one place can put a lot of stress on the camshaft and it is possible to actually break it.

Randy