Quick question. I have the chance to pick up a head that has been milled .075" and .25 Degree angle re-domed VERY CHEAP. Machine work is freshly done. I've got an 04 Shee all STOCK. If I bolted this head on and added a +4 timing key would that combo work and what octane fuel would I need to run? I know this isn't the ideal setup considering I don't have pipes or anything but the deal I can get on this is almost to good to pass up. Trying to get the most power I can...cheap!