Update on my three
snapped valve cover bolts from the weekend:
Could not get them out by welding a nut on - tried 3 times with progressively larger bolts/welds. The glowing red hot heat from the weld didnt help.
View attachment 3609474
closeup view of 1 seized in proper stuck bolt - snapped off at head:
View attachment 3609475
resorted to having them drilled out and sleeved:
View attachment 3609476
Cost an arm and leg but very happy with job. I have good faith the oil leak will be solved.
Moral of story : maintain your gaskets and if there is a leak - for goodness sake - do not keep tightening the vc bolts down in a hope to seal it.
PS: thanks for members TLCOVERLAND and Unrulykid for your advice here.