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rotorwrench · 03-08-2020, 05:28 PM

The valve angles changed after the war so prewar heads have to be modified a bit in the valve relief area to work on the post war engines. The big A heads are good ones.

03-08-2020, 05:28 PM	#4
rotorwrench Senior Member Join Date: Jun 2010 Location: San Antonio, Texas Posts: 18,018	Re: 38 heads The valve angles changed after the war so prewar heads have to be modified a bit in the valve relief area to work on the post war engines. The big A heads are good ones.