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LS3 Heads Help!

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Old 03-16-2017, 03:36 PM   #1
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Default LS3 Heads Help!

So I got a deal on some "LS3 heads" and I'm a bit confused so just want to make sure they will work for my build. Any help is appreciated.

One head is an 863 casting number and the other is a 364. From my understanding the 863 is an LSA head. It has CNC porting done on the intake runners. The 364 is an L92 head, If I remember correctly. That one has CNC porting done on the intake ports as well as the combustion chambers, which still have the lines that look like they need to be smoothed out. Correct me if I'm wrong on casting numbers btw.

I know they are both 2 different heads but will they work? My plan was to install these on an iron 6.0 to build an LS3 style engine. Personally I could care less if they are from two different engines as long as they serve their purpose.

-Thanks again!
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Old 03-16-2017, 05:17 PM   #2
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One has good valves with a denser rotocast casting.....and the L92 has a head that weighs 2-3lbs less with more porous casting running truck heavy valves.... Yes they will technically work!

Last edited by gnx7; 03-16-2017 at 05:26 PM.
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Old 03-16-2017, 05:24 PM   #3
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Bump for next post
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Old 03-16-2017, 05:55 PM   #4
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The 5364s came on my 08 LY6
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