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Bob Bidonde · 03-13-2021, 10:35 AM

Go ahead and run the Model A head on the B engine. You can use either the A head gasket or the B head gasket. The A head stock has a 4.2:1 Compression Ratio and the B has a 4.6:1 Compression Ratio. The difference is too small to matter.

03-13-2021, 10:35 AM	#18
Bob Bidonde Senior Member Join Date: May 2010 Location: Long Island, NY Posts: 3,472	Re: Model b waterpump Go ahead and run the Model A head on the B engine. You can use either the A head gasket or the B head gasket. The A head stock has a 4.2:1 Compression Ratio and the B has a 4.6:1 Compression Ratio. The difference is too small to matter. __________________ Bob Bidonde