jeepsr4ever
10-21-2006, 02:08 PM
This is for a 502 casting number. We have done .625" on the oil drainback hole but it should be dialed in on a bridgeport if you go that large.
http://i2.photobucket.com/albums/y29/bulltear/OILDRNBCK.jpg
http://i2.photobucket.com/albums/y29/bulltear/OILDRNBCK.jpg