My 340 stroked is 10.75.1 CR. My guess is about 500hp. Never dyno'd. Not sure about the CR of the stock 360's, but it's probably not above 10.0. I'm thinking 8.5-9.5. Most of your horse power will come from a good set of heads. If you can, try running a set of Edlebrocks with a stage II porting. Hope this helps.