Actually, the motor mount for the DM1 is no problem at all. The Ofna CR (Jammin) buggy mount is a direct drop in from the RC-Monster store.
Here. DM1 uses the same diff mount as the Jammin buggy so no mods are even needed to make it work. The only real challenge on the DM1 was figuring out how to mount the mechanical brake servo if you want to keep the 2 speed in it. I did keep the 2 speed and I really like the way it drives. I have been itching for spring to get it out and run it again.
Here is a link to my DM1 conversion thread..