Copper head gaskets?

ShipC1970 · 04-24-2024, 11:24 AM

Hey everyone!

Starting to piece together my combo. I’m going with the 1970 351c 300hp stocker combo for my 70 mustang. Are copper head gaskets allowed? I know the rule book says no o-ringing allowed to the cylinder heads but says nothing about the block. My reasoning for this is they only offer a .021 thick head gasket in copper form for my motor.

Rick J · 04-24-2024, 12:14 PM

You can, but don't, they can leak.
You're calculated piston to head clearance needs to be .033" or more.
Cosmetic makes gaskets at .027", actually measure ~.030" compressed.
I'd use that gasket and leave the piston .008" down.

MR DERBY CITY · 04-24-2024, 12:16 PM

Quote:

Originally Posted by ShipC1970

Hey everyone!

Starting to piece together my combo. I’m going with the 1970 351c 300hp stocker combo for my 70 mustang. Are copper head gaskets allowed? I

know the rule book says no o-ringing allowed to the cylinder heads but says nothing about the block. My reasoning for this is they only offer a .021 thick head gasket in copper form for my motor.

Cometic is your friend ….

ShipC1970 · 04-24-2024, 01:01 PM

Sweet I think cosmetic is the go to then! Thanks gents!

04-24-2024, 11:24 AM	#1
ShipC1970 Junior Member Join Date: Nov 2023 Location: Upland, CA Posts: 21 Likes: 11 Liked 11 Times in 7 Posts	Copper head gaskets? Hey everyone! Starting to piece together my combo. I’m going with the 1970 351c 300hp stocker combo for my 70 mustang. Are copper head gaskets allowed? I know the rule book says no o-ringing allowed to the cylinder heads but says nothing about the block. My reasoning for this is they only offer a .021 thick head gasket in copper form for my motor.

04-24-2024, 12:14 PM	#2
Rick J Junior Member Join Date: Jul 2022 Posts: 61 Likes: 17 Liked 44 Times in 19 Posts	Re: Copper head gaskets? You can, but don't, they can leak. You're calculated piston to head clearance needs to be .033" or more. Cosmetic makes gaskets at .027", actually measure ~.030" compressed. I'd use that gasket and leave the piston .008" down.

04-24-2024, 01:01 PM	#4
ShipC1970 Junior Member Join Date: Nov 2023 Location: Upland, CA Posts: 21 Likes: 11 Liked 11 Times in 7 Posts	Re: Copper head gaskets? Sweet I think cosmetic is the go to then! Thanks gents!