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rotorwrench · 07-07-2016, 11:17 AM

The old Harley 45, 55, & 61 CID type flathead motors are air cooled with no water ports to worry about and the intake & exhaust ports are way different. The KR type profile looks good on paper but the flow characteristics wouldn't help much in a Ford flathead V8 due to the ports.

07-07-2016, 11:17 AM	#12
rotorwrench Senior Member Join Date: Jun 2010 Location: San Antonio, Texas Posts: 17,405	Re: New block, a further discussion The old Harley 45, 55, & 61 CID type flathead motors are air cooled with no water ports to worry about and the intake & exhaust ports are way different. The KR type profile looks good on paper but the flow characteristics wouldn't help much in a Ford flathead V8 due to the ports.