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James Rogers · 03-27-2014, 04:33 PM

If the head is truly a 4.5-1 then 65-70 would close. You need to check the compression gauges against a known good one to be sure of calibration.

03-27-2014, 04:33 PM	#5
James Rogers Senior Member Join Date: May 2010 Location: Asheville,NC Posts: 3,104	Re: Model B Compression If the head is truly a 4.5-1 then 65-70 would close. You need to check the compression gauges against a known good one to be sure of calibration. __________________ http://www.model-a-ford-4bangers.com/