OK, I have the engine installed and the servo mounted but I havent started on the linkage yet.

I installed the exhaust header support and it fits just right.

Facts about the DZ.
It fits into the motor mount EXACTLY like a 1.40 sport. It hit in the exact same spot on the spinner backplate and looks great. It is a couple mm taller. Also the rear part of the engine does in fact protude about 6mm further back towards the motor mount. I would definitely call it a drop in replacement for the 1.40s, provided that you have enough clearance from the rear motor mount bolts to the front of the base of the mount.

I think I need to do something to support the servo but I so dont want to add anymore weight to the front.