head gaskets?
#1
TECH Apprentice
Thread Starter
iTrader: (10)
Join Date: Mar 2010
Location: El Paso, TX
Posts: 319
Likes: 0
Received 0 Likes
on
0 Posts
![](https://ls1tech.com/forums/images/ranks/ls1tech10year.png)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Alright so I listed the wrong heads at it was the PRC STG 2.5 5.3 heads not the LS6 heads. And I'll Be running it with a EnglandGreen Mayhem II cam.
what head gasket should I run? 5.3? 5.7?
what head gasket should I run? 5.3? 5.7?
Trending Topics
#8
TECH Fanatic
#10
TECH Apprentice
Thread Starter
iTrader: (10)
Join Date: Mar 2010
Location: El Paso, TX
Posts: 319
Likes: 0
Received 0 Likes
on
0 Posts
![](https://ls1tech.com/forums/images/ranks/ls1tech10year.png)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
This is the first time i've ever done a big cam swap and decent heads, so how do i measure it? is it the circumference of the piston or from the Head? the extent of swapping was 317s on a stock ls1
for my valve train i have the PRC STG 2.5 5.3L heads with trunion upgrade and lunati gold springs for .660. its going through a T56 stock 10 bolt. i'm getting a M9 in june.
for my valve train i have the PRC STG 2.5 5.3L heads with trunion upgrade and lunati gold springs for .660. its going through a T56 stock 10 bolt. i'm getting a M9 in june.
#11
TECH Fanatic
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
2. Measure width of combustion chamber. With 5.3 heads, I'm guessing this is around 3.8XX.
For example, my block is 3.905" bore, and my head combustion chambers are 3.96X. In that case, anything 4.000" and over is acceptable.
#12
TECH Apprentice
Thread Starter
iTrader: (10)
Join Date: Mar 2010
Location: El Paso, TX
Posts: 319
Likes: 0
Received 0 Likes
on
0 Posts
![](https://ls1tech.com/forums/images/ranks/ls1tech10year.png)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Ah ok thanks, another question somewhat related. When you get PnP heads from PRC do they remove the casting number and replace it with PRC or do they leave the casting number?