if you rod bearing went, you will need to replace them all. most likely with oversized bearings. you will also have to have your crank grinded for the new size bearings. many people will say you can just put new bearings in and sometimes you can. however you should have a machine shop look at the crank and tell you their input. often they are right. you should consider doing the pistons, connecting rods, piston rings, oil pump, and have the block machined as well.