World Models only gives instructions and parts to mount 1.60 FX engine, and they have you install the engine at an angle or diagonally to the right of bottom. Remember the right thrust is already built into the firewall. You will need to used the center line they provide on the engine mount plate. I would suggest to mount the ZDZ inverted and straight down, you'll more than likely have to trial fit the motor and engine box several times to get the right distance from the firewall to the cowl (spinner) opening. DO NOT glue any parts of the motor box together until you are sure the distance is right and marked. This will allow you to fine tune the distance from the firewall to the cowl (spinner) opening.

As far as the ZDZ mount is concerned it is a rear mount. I have seen people build motor boxes to accomodate the rear carb and mount, and I have seen others use long threaded nuts or extensions for all-thread to make an offset for the rear mount as well. Take a look at the ZDZ website for installations at www.rcshowcase.com

Hope this helps...