Re: Head Gasket for the 6:1 Iron head
The most recent Best gasket I bought for a Model A was a 509G. The only difference is the 2 small holes between cylinders 2 & 3. They still have the 573G, and it is for the Model B block. Notice in the picture there is a Best 573 on top of a Best 509. Both are GraphTite. Notice the holes in the 573 and no holes in the 509. All other holes and shape are exactly the same.
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