You might be able to by dropping the oil pan, taking the main girdle off, dropping the crank (may have to take the front timing cover off to get to stuff on the nose of the crank, I dunno), and then pull the pistons out from the bottom. Then you can get to the rod bearings.
In order to drop the oil pan, you have to drop the crossmember, which is where the engine mounts are. You will have to support the engine with a lift. If you are going in there to replace the main bearings, you should also do rod bearings, and check the crank, and rings, and....... Makes more sense to pull the engine and do this type of work in a CLEAN environment, unless reliability doesn't matter.