Thread: General Hemi Info part 3

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Transmission Adaptors

When the HEMIs were new transmissions of the day could leave a lot to be desired. Currently you also run into the additional problem of finding parts to rebuild them and someone who knows how to go thru one. This makes a transmission swap look very appealing when you get to the point of actually putting one of these engines into a car or truck. There are a bunch of adaptors out there for both automatic and stick setups. Most are listed as being for the non-extended bellhousing Chrysler 331-354 and 392. For the Dodge and Desoto owners, the bellhousing bolt pattern on your engines is the same. The only thing that I can think of that would cause them not to work would be the amount of crankshaft overhang. For you info, the crank overhang on the Chrysler engines is 1 ¼” as measured from the rear edge of the rear main cap to the outer edge of the crank flange. I’ve never done an automatic adaptor but have done a 4 speed based on Chryslers A833 gear box.