Removing gas

Mix some high (pump) octane and don't worry. Thats what you should be running anyway, you're engine probably isn't so percisely designed that 89 will always be fine. Weather, as well as the variety of different gas stations will change what fuel is 'okay' and what pings..


Those Magnum heads aluminum? If not definitely with 10.5:1....You don't have the spark or fuel control like a newer car to make a lower octane work, it'll just eat itself if you get bad gas or the tune isn't perfect. Not worth the extra 15cents or something..