[timc]

If your on a budget, like some of us, then I would not split the block unless you have over 150k, or you have run low on oil, hot, low oil pressure etc etc.

Assuming you are less than 150's, do the heads and rings (if your pistons/cyl are still in spec) , and do rod bolts. These can be done without splitting the case. Then at 300, do the complete engine.

Performance: I'd do a chip, exhaust, and SSI's, and if you have the money a larger throttle body. Open up the air cleaner if you want to hear the cool sounds of the throttle plate.

Your gonna get alot of opinions on this, so just pick and choose what you and your mech feel comfortable with.

Good luck.