Strange 3946074 ( ZL-1 & L-88 ) heads

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Strange 3946074 ( ZL-1 & L-88 ) heads

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03-17-2007, 08:18 AM

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Re: Strange 3946074 ( ZL-1 & L-88 ) heads

I had a set of 074 heads that had a D shaped exhaust port. After close inspection you could see where the bottom of the exhaust port had been filled with aluminum, blinded in and then machined. It was nicely done and hard to tell. The shape was exactly the same as an 077 aluminum head.

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