will have a look see what crancks i have kicking about not sure if i have any std 2ltr ones tho.
crud dosent tend to go up the oilways the oil pump sees to that, tho it is alays good practice to removethe oil pump and blast all the oil ways out, i use air and thinners normaly, also very worh blasting out the oilways in the cranck just to get the sludge out so new bearings last longer.
sadly if the cranck is fecked your better off looking for a new bottom end if a few shells and a 2nd hand rod would have fixed it its worth doing but when your into shells, rod, cranck you may as well completly rebuild or get another motor