Keep blowing head gaskets and looking for a shop

I keep blowing head gaskets. Got a FFR cobra replica. Running a pretty stout 302 with a 6lb powerdyne.

I hopped on it today and blew the passenger side head gasket. It's not the first time. It happened once before. That is, before the supercharger was added.

So after I blew them the first time, I had a shop put on the ford motorsport torque-to-spec head gasket set about 2 years ago. They also milled the heads per their suggestion.

What can I do to keep them from blowing again? I'm only running 6lb boost. I should be able to hop on this thing whenever I want without worrying about the gaskets blowing all the time.

Is there something I should be doing differently?

Can anyone recommend a ford 302 shop in the northern IL area that I can speak with to get some advice and have them re-do the gaskets (and/or engine) ?

I am Vernon Hills. Would consider taking it anywhere in our area to get it into the right hands. Someone that specializes in blower cars would be great.

Fuel Injected.

Thanks, I'll email you. I had to change my email address, stangnet had the old one.