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Ol' Ron · 09-24-2019, 10:57 AM

Agan, relieving a block offeres little in the way of improving airflow in the cylinder, unless the head has been cast in a way to improve compression. AS in early Hi Compression heads
Yes, installing a 3 3/4 stroke piston on a 4" cramk, then boring the head for .050" piston clearance will give a 276 engine 9:1 CRn

09-24-2019, 10:57 AM	#10
Ol' Ron Senior Member Join Date: May 2010 Location: Chester Vt Posts: 8,860	Re: 8BA Edelbrock head clearance Agan, relieving a block offeres little in the way of improving airflow in the cylinder, unless the head has been cast in a way to improve compression. AS in early Hi Compression heads Yes, installing a 3 3/4 stroke piston on a 4" cramk, then boring the head for .050" piston clearance will give a 276 engine 9:1 CRn