MoparFins

Techical Discussions => Tech- - Engine => Topic started by: Steve on September 21, 2009, 12:44:36 PM

Title: Which head gasket ???
Post by: Steve on September 21, 2009, 12:44:36 PM
Ok. . this is what I am building
 
I am going to take a 79 360 and plop a set of 86 318 heads on it. 
 
I have no plans to remove the pistons, which are low compression.  But I am hoping the closed chamber heads from the 318 will bring it back up.  The 79 360 is 8.0:1 and the 86 318 is 9:1 with flat pistons. (I think. . I forget)  This combo should give me probably around a 9.2 to 1 which is good enough.
 
The Bore on the 360 is 4.00" and the 318 is 3.91.
 
Which head gasket should I use?  A delemma.
 
I'm thinking the 360 gaskets with a set of 318 intake gaskets
Title: Which head gasket ???
Post by: Stitcherbob on September 21, 2009, 06:08:03 PM
http://www.cometic.com/domesticauto.aspx (http://www.cometic.com/domesticauto.aspx)


Title: Which head gasket ???
Post by: Steve on September 21, 2009, 06:34:16 PM
Thanks Bob
 
But $200 BUCKS for a set of head gaskets?
Title: Which head gasket ???
Post by: Butch Houghton on September 22, 2009, 05:45:49 AM
Yeah,, you need the 360 head gaskets.  Don't want the Gasket hanging over in the bore.

318 Intake is correct too for those heads.

I'd just use the good Ole' Fel Pro Blue Permatorque's.

I've got the Cometic's on the Elephant but sure wouldn't use them on a normal build like that.  My SB stroker just has the Fel Pro's on it too.  

Butch


Title: Which head gasket ???
Post by: Stitcherbob on September 22, 2009, 01:18:49 PM
The reason I posted that link is cuz he just had a leaker and thought those forever gaskets would be a good thing....

Title: Which head gasket ???
Post by: Steve on September 22, 2009, 01:52:13 PM
I keep telling you it wasn't the gasket leaking. . It was a couple of bad cylinders and a warped deck
Title: Which head gasket ???
Post by: Butch Houghton on September 23, 2009, 06:49:25 AM
They're good but if you don't have the right finish on the block deck & head surface they WILL have leak problems.    We planned the Hemi build with the Cometics in mind & they have'nt leaked any.

For what it's worth,  Fel-Pro also has an MLS gasket int heir listings too & a lot cheaper.

Over the years we've done a lot with just the Blue Permatorque's & never had a failure,  with no special block prep.    Even have an EDDY headed 318 that has them & no issues.

Butch


Title: Which head gasket ???
Post by: Steve on September 23, 2009, 07:20:33 AM
Thanks Butch
 
I need to call you and get you caught up