It had to be detonation blowing out that head gasket, right? Not due to the compression, per-se (except as compression effects burn rate). You were running forged pistons, right?
I'm not questioning you, just thinking out loud, trying to wrap my brain around it.
This motor had no issue with detonation ,If it had the pistons would have been all pitted up and so would have been the valves Or even the head maybe. And I have Photos of the pistons.And Like i said I am still useing those same pistons in another motor.
God doesn't like ugly.
