Re: Head gasket selection question
Are you wanting to bump up the compression from stock?
Was the block decked?
A fel-pro composite .039"-.040" is stock and if you wanted to bump up compression a little I would use a .025" composite gasket. I would tell you to use a shim steel .015"-.020" to get even higher compression but I would never use one, I'd hate to have to pull the heads back off to replace a leaky gasket just to gain a fraction of a hp.
I have never had a prob with fel-pro head gaskets.
The only Mustang I'd ever own is a Fender.
'68 333" Camaro
'14 5.0 Mustang