The Ford Barn

3739ford · 07-14-2019, 09:30 PM

Am I ok to use the fiber stock head gasket with a 3 5/16 piston. I laid it up on the block tonight and looks like it hangs over the bore some.

What is the part number for copper head gaskets to use.

deuce_roadster · 07-14-2019, 10:26 PM

NO they make gaskets for that bore. I use Best brand composite gaskets.

Mac VP · 07-15-2019, 05:14 AM

Anything above .080” overbore will require the use of “big bore” cylinder head gaskets. We stock them (in the BEST brand) in regular composite material or the copper clad gaskets. They’re both a bit more expensive than the regular gaskets but this is what you need.

Bored&Stroked · 07-15-2019, 06:37 AM

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I prefer to use the BEST brand for this application - I like the composite materials the best . . . until I have to pull the heads and clean the deck (especially if you're running studs) . . . Arrrggggghhhhh! But - it is what it is.

Other Options: On a recent race-style type build, I have experimented with Cometic MLS gaskets - very expensive, but have worked well for the last couple of years. If going this route, you really need the correct surface prep (deck surfaces) - so if you're not decking the block, you may have sealing issues with water.

07-14-2019, 09:30 PM	#1
3739ford Senior Member Join Date: Feb 2017 Location: Dothan, AL Posts: 325	Head Gasket Question Am I ok to use the fiber stock head gasket with a 3 5/16 piston. I laid it up on the block tonight and looks like it hangs over the bore some. What is the part number for copper head gaskets to use.

07-14-2019, 10:26 PM	#2
deuce_roadster Senior Member Join Date: Oct 2011 Location: Shelton, WA Posts: 3,800	Re: Head Gasket Question NO they make gaskets for that bore. I use Best brand composite gaskets.

07-15-2019, 05:14 AM	#3
Mac VP Senior Member Join Date: May 2010 Location: Cincinnati, OH Posts: 1,361	Re: Head Gasket Question Anything above .080” overbore will require the use of “big bore” cylinder head gaskets. We stock them (in the BEST brand) in regular composite material or the copper clad gaskets. They’re both a bit more expensive than the regular gaskets but this is what you need. __________________ VANPELT SALES LLC Cincinnati, Ohio Office: 513-724-9486 www.vanpeltsales.com www.classictransmission.com

07-15-2019, 06:37 AM	#4
Bored&Stroked Senior Member Join Date: Jan 2011 Location: Central Ohio Posts: 5,067	Re: Head Gasket Question Sponsored Links (Register now to hide all advertisements) I prefer to use the BEST brand for this application - I like the composite materials the best . . . until I have to pull the heads and clean the deck (especially if you're running studs) . . . Arrrggggghhhhh! But - it is what it is. Other Options: On a recent race-style type build, I have experimented with Cometic MLS gaskets - very expensive, but have worked well for the last couple of years. If going this route, you really need the correct surface prep (deck surfaces) - so if you're not decking the block, you may have sealing issues with water. Last edited by Bored&Stroked; 07-15-2019 at 07:25 PM.