I personally would never reuse old rings, they will usually spin in the cylinders and line up resulting in using oil or smoking. If you havent pulled the pistons and the engine didnt use any oil and has reasonable milage leave them in. Bearings are cheap and will also help to restore any lost oil pressure. Being you have the head off I would have it checked for cracks, they where prone to cracks. I am not sure if you are going to use this head for turboing, (personally wouldn't),in the interim of going to build for a turbo I would deck the current head just to raise the CR for a little better drivability while you put things together. If building down the road for turbo I would also consider getting another block and do the build up on it vs downtime on your current project. Motors can be had anywhere from $50 & up and no sense wasting money going back through your engine again since you are not doing a full rebuild this time, if you are going to use this block for you turbo build and it has a lot of milage on it then it will need to be bored, hot tanked etc and going turbo possibly forged pistons, your current setup will not need an expensive flywheel or any other exotic peices (stall converter) do these when you are ready to go that route, peformance of a stock motor with a 2500/3000 stall would be a waste of time, money, and no real performance gains.
