joeld wrote:
Hey Joe,
my concern is with the actual bore size of the GM gasket.
With my engine being .040 over I was concerned about the fire ring being too close to the edge of the cylinder wall. I wasn't sure if the advertised specs on this gasket were a true 4.0 bore size or if in fact it was a little more to allow for any over bore engines.
As far as the thickness, I'm not actually trying for the .51 thickness. This just happens to be what this gasket is.
What I am trying to do is get the best sealing gasket for a simple street driven car. This gasket is the GM replacement for a alum head L98 and I was "leaning" towards using all GM gaskets.
The piston is down in the hole.

Could just go with Fel-Pro #1003 and get on with this.
Any suggestions?
Thanks for the reply
Joel