Got another chamber done tonight.

Before.  Notice the shrouding around the intake valve and the texture in the casting.

During.  Shrouding blended out and bowl edges worked in.

Finished, after #220 wet sand and polish with a felt wheel on the dremel.  The aluminum mag polish seems to work pretty well.

Still to do on this one is clean up the valves and lap the valve seats.  I also tried out my flatstone on a section of the head, which is why it looks like a honed finish.  IPA alcohol seemed to keep the stone from clogging up - I tried water and it starting collection a lot of particles. 

My timing chain dampener also came today and I got that put together and mocked up.  The adapter plate is secured to the block with the bottom 3 bolts of the camshaft retainer plate, and has mounting bosses that the LS2 dampener presses and bolts onto.  The dampener is not compatible with the LS1 spacing, so I figured this was the best solution over drilling into the block or hacking up a damper and worrying about it coming apart.  I hope that it will help to alleviate any timing chain problems.