There are a few things I reccomend you do or have the machine shop do that they don't usually do unless asked.
1. Chrome moly rings- more durable, same price.
2. Balance pistons and rods. Balancing the crank/flywheel/clutch assembly is probably not necessary.
3. Hardend valve seats. (unleaded gas)
4. Tap the front bearing cap to install the two lower timing cover/engine mount screws from the inside.
5. Have the crank drilled and tapped to be able to use a standard small block chevy crank bolt to install the pulley.
6. Drill and tap your block for full pressure/full circulation oil filtration (if your engine is a post 1954 235). Here's a link:
http://www.speedprint.com/Deves50/oilfilterinstall.php
