Head gasket with turbo pistons

[sri_130]

Forged engine is being stripped down and will put in ARP head studs, but need a new head gasket.
Ran a standard gasket and standard head bolts before and I'm pressurising the coolant at 270+bhp.

The pistons are wossner pocketed jobbers. slightly oversized at 78.7.
Unsure if head has had anything off before. Probably will have had.

Closest Athena gasket thickness I can get to a stock thickness is 1.4mm. Favouring Athena with the fire rings. However their bore size is 80.50 when others are 80.

Presuming this will be fine... or any other suggestions/sizes/ideas?

[Chipwizards]

Make sure that the block and head are properly flat.

You shouldn't have problems at that power with a totally stock gasket, nothing 'upgraded' required.