An article called "Static vs Dynamic Compression" in the Feb 2002 edition of Car Craft said that a small-block engine with a cranking compression of no more than 160 psi could run on 87 octane. Does this method sound ok to you guys? The only reason I am questioning this is because my 302 has Windsor Jr heads w/ 58cc chambers and kb flat top pistons, according to kb's website this combo should produce 9.6:1 compression. On this information alone the motor has always gotten good quality gas of at least 91 octane but, after reading the article I did a compression test and my cranking compression was 135 psi, do you think I should try 87 octane gas? Not that gas prices are too bad these days but 87 is 20 cents cheaper per gallon and if I am running too much octane it is probably hurting power. Any input would be greatly appreciated.