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Ole Don · 07-03-2011, 06:40 PM

I spoke with Don Fransisco once about this subject back in 1995. He said he and some others built a flathead that dynoed 425 on a heavy load following the old methods of bore, stroke, port, relieve, and no, the engine didnt last very long. I think Hot Rod ran an article on how they did it.

07-03-2011, 06:40 PM	#12
Ole Don Senior Member Join Date: May 2010 Location: St. Michael, Minnesota Posts: 1,713	Re: 435 horsepower in 1955..... I spoke with Don Fransisco once about this subject back in 1995. He said he and some others built a flathead that dynoed 425 on a heavy load following the old methods of bore, stroke, port, relieve, and no, the engine didnt last very long. I think Hot Rod ran an article on how they did it.