Rebuilt in 06 and run on Da Wagon for three seasons. Pushed 4300 lbs to mid twelves every time out. Add you're own secondary vacuum dashpot and bolt it on. numbers are as follows 7040240 MD 3469 decodes as : 1970 4bbl Buick Auto trans Built 346th day of 1969 (dec 12th) We have an 800cfm now and this 750 just sit's in a box all lonely. located just north of Chicago. $125 plus shipping to lower 48. thanks for looking D&B