Vintage blowproof bell housing with a part number of 2313 for big block Mopar B/RB engines - appears to be an older Lakewood piece but can not confirm by the part number. Bell has a "DYNO USE ONLY" stamp on the top - no clutch fork provision as seen in the pics. Output pattern is the common GM transmission mounting pattern with a center hole diameter of approximately 4 11/16" and is 6 1/4" deep. Has never had any damage and all the holes and threads look good. Would make a great piece for a dyno stand for engine testing.