I seldom see in ANY of the engine build-ups mentioned by anyone, even the magazines, the use of High-Compression pistons any more. No matter whether you are using cast, hypereutectic or forged, the prices are all real close (within the type of pistons you choose) for a set of 8 1/2 or 9 to 1 pistons, as the price for a set of 10 1/2 to one pistons. And, dollar for dollar, again may simply be the CHEAPEST power upgrade you could do if you are putting new pistons in anyhow. What's the price difference going to be between low comp units and their high compression brothers? Check your Jeg's, Summit, etc. catalogs and you will probably see the price difference for a set of maybe $50 or so. For my money, this is almost FREE horsepower, and is ignored by the horsepower gurus these days. I honestly see NO point in putting a couple thousand dollars in some upgrades, and letting the easy and cheap horsepower get forgotten. That's kind of like putting on a blower with a two-barrel carb, why do it? You should still be able to use 91 Octane pump gas. What do you all think?