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Ol' Ron · 03-03-2011, 03:16 PM

When doing a swap Like this I like to use the 81A "A" head. This has a smaller combustion chamber. Mill the head for .050" piston to head clearance. Now you'll have to check for valve iinterferance between the valve and head. This can be cleared up with a die grinder. Almost a point in CR can be gained tis way.

03-03-2011, 03:16 PM	#18
Ol' Ron Senior Member Join Date: May 2010 Location: Chester Vt Posts: 8,861	Re: 59AB heads on a 8BA block When doing a swap Like this I like to use the 81A "A" head. This has a smaller combustion chamber. Mill the head for .050" piston to head clearance. Now you'll have to check for valve iinterferance between the valve and head. This can be cleared up with a die grinder. Almost a point in CR can be gained tis way.