I'm not sure what mount it is. I'll try and get a photo posted. For some reason my computer is refusing to read my camera card at the moment. I'm going to climb under the 79 this morning and see if the mount will bolt onto the 79 the way it came off the 83. I'll also put the rods off the 83 onto the 79 shifter.

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Resurrected Nov 2010 - 79 240(SD) with 83 617 engine and 4 speed manual, 2.88 rear and 2.5" straight pipe unknown mileage (Salmon)
83 240D parting out
96 Dodge Cummins 5 sp 4X4 long bed - 310k

http://flickr.com/photos/11103112@N03/