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317 Head swap

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Old 02-23-2010, 12:00 PM
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Default 317 Head swap
I'm swapping my stock 806 heads on my 98 TA for some remanufactured 317's. Would the 5.7 L MLS gaskets be okay to use? I'm doing a basic stock rebuild with some bolt ons.
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Old 02-23-2010, 12:13 PM
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I am sure you already know this, but you are going to lose a decent amount of compression running 317 heads with stock LS1 pistons.
Last edited by Ford_Assassin; 02-23-2010 at 08:25 PM. Reason: Correction....
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Old 02-23-2010, 12:56 PM
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Originally Posted by Ford_Assassin
The stock 5.7 MLS gaskets will be fine.

I am sure you already know this, but you are going to lose a decent amount of compression running 317 heads with stock LS1 pistons.
^ yep you are
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Old 02-23-2010, 01:01 PM
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I'm aware...but the heads were milled down a bit so I wont lose too much. Plus this gives me the opportunity to slap on a blower or nitrous system if I ever want : )
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Old 02-23-2010, 01:21 PM
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Nope. Use the 6.0 mls gasket with the 317's
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Old 02-23-2010, 01:40 PM
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Originally Posted by kobraa
I'm aware...but the heads were milled down a bit so I wont lose too much. Plus this gives me the opportunity to slap on a blower or nitrous system if I ever want : )
Should have mentioned that in the 1st place
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Old 02-23-2010, 02:44 PM
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I guess...I was more concerned with using the correct gaskets tho
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Old 02-23-2010, 05:40 PM
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Originally Posted by Ford_Assassin
The stock 5.7 MLS gaskets will be fine.

Originally Posted by BadgeZ28
Nope. Use the 6.0 mls gasket with the 317's
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Old 02-23-2010, 05:53 PM
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I called Texas Speed and they told me to use 6.0L gaskets.
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Old 02-23-2010, 06:00 PM
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The combustion chamber width is the issue, if the gasket is too small it will hang out or be too close to the edge of the cylinder and it will become a hot spot or get burned. So, use 6.0L headgaskets.
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Old 02-23-2010, 06:02 PM
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Originally Posted by kobraa
I'm aware...but the heads were milled down a bit so I wont lose too much. Plus this gives me the opportunity to slap on a blower or nitrous system if I ever want : )
stage 2.5 LS6 heads work great for blowers also
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Old 02-23-2010, 06:39 PM
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Originally Posted by 69LT1Bird
The combustion chamber width is the issue, if the gasket is too small it will hang out or be too close to the edge of the cylinder and it will become a hot spot or get burned. So, use 6.0L headgaskets.
Definitely 6.0 gaskets.
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Old 02-23-2010, 08:26 PM
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Okay, so lets flip this. What stock MLS gaskets to use if you are running 5.3 heads on a 6.0?
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Old 02-23-2010, 08:31 PM
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There really is not difference, if the bore of the cylinder is the biggest opening that's the head gasket to use.
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