There's actually a pretty effective way to repair that crack. Thoroughly clean the bearing cap and stop-drill the crack at the upper end with about a 1/16" or 3/32" drill bit, all the way through to the bolt hole. Then V-groove the crack a little with a cutoff wheel in a Dremel tool or a die grinder and braze over it. It might be necessary to line bore the block afterwards, but it will keep the engine from being a boat anchor. A properly-prepared brass repair is just about as strong as the cast iron it's applied to.
Jerry
I'll second this, as I have one that's repaired with this exact method in mine (rear intermediate). Got well over 25000 miles on it since, no issues at all. No need to junk a block over an easy repair.
