Originally posted by SVTfrog:
My guess is that if the SPEC is made by another company trying to match Ford's design, then it could be different when compressed.

I'd use the Ford one (which the v6 ford tob I have compresses down the same as your's, with the outer part going further down than the inner ring).

Some SPEC kits come with remaned slaves (Ford logo ground off). That was the verdict a few months ago.

Ryan Trollin!