Curious - what would be a maximum power that could be run with a group A head gasket.

obviously not expecting a 600bhp engine to be running one, but as for mine... a T34 running 28 - 30psi on greys would a Group A head gasket be more than upto the job?

Just got a few symptons showing now of the head gasket giving way, it hasnt been on the car for more than 5 months use but id have thought it would have coped with my power more than comfortably