318 went off to the shop

Comp 901 springs for sure with a 268 (probably with 262 also I haven't looked). Factory retainers and locks are just fine, and that's also what I'm running.

Since my engine is low milage and already in the car, I didn't do pistons but I believe the KB are the only choice at all unless you want the low compression :/ look on ebay, you should be able to save $20-$30 on them there most of the time.