Payne & victor are not as good as ford motorcraft gasket.

Gus sorry missed that q.
Athena gasket supplied by pec.
I run less than 22psi makes 260bhp. Greens run out of puff and greys is not suited for what I use the car for so pretty much at the limit of where I need to be.

Car weighs nothing works out just under 300bhp per tonne.