Jamie,
Have seen them cracked that way before, usally it comes from being frozen solid and freeze plugs pop and the section around drain plug heaves a little and cracks. It is a easy fix, but make sure to mag it there could be others not visable. poppaj


AA/NSS 65'Coronet "Whompin Wedge"
Pop & Son Performance 557" B-1 power
John Holt Chassis