Hi Comp+ X Heads+ 93 Octane possible?

It's all about the package - that means engine, trans, gearing, car, and tune. You certainly can do it. But the higher you go, the more it gets critical that you can tune. If tuning is not your cup of tea, run a thicker head gasket and lower it. There's no need for more compression, and in some more extreme cases you will have to over cam the engine to get the whole deal to safely run. While that sounds cool on paper (and at idle) it can be a PITA over the driving lifespan of the car. Set your static at 10:1 or more and you have to choose a cam that has at least 230° @ .050, and an LSA of 109 or less. Set your static at 9.5:1 and you can run a cam with a wider LSA and less duration. It will idle cleaner, be more efficient cruising around, and more responsive with a street type convertor/gear package. That's probably why Hughes said not to. He is a dick... but in this case he was on the right track for the majority of enthusiasts IMO.