425 build
May 17th, 2017, 09:19 PM
#2
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Join Date: Feb 2013
Location: Phoenix, AZ
Posts: 13,738
The E heads will bolt up as all Olds heads (BBO and SBO) have the same bolt pattern. Do you know if your 425 is a 45º block or a 39º block? It may make a difference for push rod clearance (the E heads are from a 39º block).
May 17th, 2017, 11:38 PM
#3
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Join Date: Apr 2011
Location: Nor Cal
Posts: 1,964
Set one E head on your engine and if the lifter hole lines up with the push rod hole your good to use. But if they are off you must grind some metal off the bottom of push rod hole in your heads to work.
May 20th, 2017, 11:43 AM
#4
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Join Date: Apr 2012
Location: Bradenton, FL
Posts: 1,467
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wildwillie1981
Racing and High Performance
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April 24th, 2013 04:19 PM
