Sometimes it is impossible to ream and push from the back side due to a lever mount or some object in the way of the bushing machine. In that case, I ream and push in the bushing from the front making sure the rear side of the bushing is flush with the plate. If you are bushing by hand, this does not apply. Since reamers cut a straight hole rather than tapered, it really doesn’t matter as long as the rear of the bushing is flush with the plate. If you use a file or broach that is tapered, however, it probably would be better to broach/file and push from the rear side so the bushing won’t pop out. And, yes, the oil sink always goes on the outside.
Will