KB alum block What head gasket is everyone using PN if possible?

Its not that easy with the info you gave. NA or power-adder, bore size, quench, desired compression. After you figure out the thickness you want you could call the guy in this link. I think he recommends .030 over bore size and you should have them in your hand in 4-7 days.


http://www.4secondsflat.com/Cometic-MLS_Gaskets.html

Um, how would we know? Wouldn't we need to know the bore size and if it is a Hemi or a wedge and maybe the compression ratio and some stuff like that?

We Always used solid copper. I have found Copper to be more forgiving in regards to the deck/surface finish and it can be reused if necessary.
As stated above, you will need to know your cylinder bore and engine type, wedge or Hemi.

426 Hemi 4.510 bore

KB hemis move the steam holes out away from the bore. You can get cometic from KB and they may be an exclusive that you can't get direct from cometic. I would call Tim Banning or Ray Barton.

Here's the one I use for KB street HEMI blocks

HEMI head gasket, 4.50 bore, copper, .050 thick, special bolt pattern for KB block, Part # H1265SPX050C

This is a custom gasket made for me by Cometic for the reasons stated above. If they won't release this to you have Cometic call me.

Rich Nedbal 209-247-6497

Just A FYI: I called Cometic and they gave me PN# H1265SPM040XP for a Keith Black 426 aluminum Hemi with a 4.500 bore

Cool. Mine was a custom. They must have come up with a production number

The SPM in the PN# means Special Mopar & the 040 is the thickness. not sure of the other numbers in the PN number.

Your original question makes more sense now that you've provided some more info! Sounds like you found what you needed.

I didn't see that I forgot 426 part in the original post. But i'm pretty sure i have found the proper gasket, Thanks all