MC Head gasket upgrades?

[Phil Payne]

> It is probably the stock bolts that has caused the failiure, they are not
> reusable.

They're supposed to be reusable just once - but of course you rarely know whether they've been reused already.  In any case, for a
special application, I can't see the justification for taking such a risk.

> My head will go on with a stock gasket and M12 12.9 quality insex bolts. The
> torque specs that I recived was 120-140Nm. If i can get nuts and studs that
> fit I will go with them instead.

I've never measured the torque when bolting a head down, but I have a feeling it's higher than that.  That has you finishing the
half-turn from 60Nm at only twice the torque - the memory in my hands and arms is that it's more than that.

I'd be cautious about using anything other than stock.  If yoiu stop the head bolts stretching by brute force and the engine enters
a condition that would normally cause it to do so, where does all the energy go without that safety-valve function?