6.0 head's on stock shortblock for boost...
 

Ok I have heard rumor's of the 6.0 head's not being able to run a stock 3.900 bore gasket..if this is true what gasket should i use?..it's a bone stock factory short block...also someone said something about welding/modifying the chamber to match the bore size??..is that needed or is that just you you can run a 3.900 gasket or to unshroud the chamber to produce better flow?...thank's,

Carter

The 6.0 is a 4" bore, so a 3.900 gasket is gonna hang into the chamber. Get gaskets from FelPro or Cometic. Don't reduce the chamber by welding...

Thank's scott,
So I just use a 6.0 liter head gasket?...or do i need a custom cometic with a 4" bore for a 346 block?...kinda lost lol...thank's,

Carter

I went with the GM MLS 6.0L head gasket on my 348 with 6.0 heads. You can get them from scoggin dickey for about 35 each if I remember right.
I wanted to go with cometics but after all the leak issue I have seen with them I didn't want to chance it.
But the cometics come in the 4" bore size too, they are are readily available if you want to stick with those.
J:D

So the GM MLS 6.0 gasket's are not 4" bore?...or are u just saying cometic has them redily in stock?

I can tell you yes, the GM 6.0's are 4", and Cometics are also readily available.

What about graphite gaskets...are there any graphites that will work?

Thanks Scott for making that clear for me:cheers:
10secZ if you are going FI go to the MLS gasket from GM or cometic, they hold up to boost better than the graphite.
J

Frcfed, Whats the part number for those GM MLS head gaskets?? thanks
Kyle