I cannot overbore, but I put LP pistons in my MF65 gasser for a 9.1:1 compression ratio. I did not own it when it ran the stock 7:1 so I am not sure what the difference is. I have a short vertical exhaust and she cracks clean. More power than I need and I haven't broke anything yet. I run 91 octane for peace of mind. I don't think it would detonate on 87, but I am not sure I could hear it over the exhaust.
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Today's Featured Article - The David Brown Rose Badge - by Samuel Kennedy. In the 13th century civil war was raging in England. Two English noblemen were involved in a conflict which became known as the War of the Roses. The Duke of York had as his emblem a white rose and the Earl of Lancaster had a red rose. Today the white rose is the official emblem of the county of Yorkshire and the red rose has been adopted by the neighboring county of Lancashire.
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