Originally Posted by Karl
I would have helped, but I am in breach of trader rules.

i won't complain.
Originally Posted by fordpop
if you use both grooved mains bearings you will have no oil starvation to bigends at high revs
cosworth bearings are harder
You will have oil starvation, or wont??
i could only see this possible if the crank and shells are worn, as the tolerance is what causes the pressure, not the groove.
This are meant to be lead/copper heavy duty items.