Originally Posted by DAHoyle
Minor correction here.
Most Cummins 4BT do not come with a GM bolt pattern.
The Cummins uses a Bellhousing adapter which goes between the engine and bellhousing, and there are many many versions available.
Ford small block pattern
at least 2 Dodge Patterns
Yes I know that cummins has there own bolt pattern.
I've seen 4bt in ford vans, but the most common trans I've ever seen bolted to them is a TH400 every time I run into one it's bolt to a TH400 out of an old chevy box van or has nothing bolted to it and it's attach to a generator