Just curious, How fresh is your current setup? Did you do the work? Are you just wanting more power or is your 318 getting tired??
If you want to do a 360, You could work with a trusted supplier and build package #9 yourself. They can price all the parts for you. If you're working with someone you trust, they can help you through it with things like making sure the Crank & Bearings match up, the Pistons & Rings match the bore. This way you can build it to your exact needs.
I think we need a bit more info as to what you really want. Your current setup sounds like a real fun street machine already.