I Had an Eindecker several years ago with the engine inverted and the muffler pointed down (or is it up with an inverted engine?

) - anyway the system looked good - it didn't work that well but it looked good...
Personally; I do not like inverted engines, if they are not tuned properly they are hard to start and you have to reach under the plane passed the spinning prop to get the glow igniter etc ... I don't like them... [:'(]
IF you wish to keep the overall shape of the AC - fine rotate the engine 90 degrees and put the carb adjustments at the bottom... the key is to not have raw fuel collecting in the top of the engine and putting out the glow plug. [

] IMO
Next is the Eindecker itself - I kept it for only one season and then got rid of it ASAP. Again - a personal preferance. I found that it was very scale like - read slow with very limited aerobatic capabilities.
Also it was very difficult to take off - and I have been flying since 1995. Due to the high lift design of the wing coupled with the high angle of attack of the AC (tail dragger) the plane wants to jump into the air before you have sufficient speed to actually 'FLY'. Therefore once at an altitude of about 20' the plane looses speed and tip stalls. The normal reaction is to apply more throttle (torque roll) and give it more Right aileron - which increases the amount of stall ... [

][:'(] [&o] - Trust me... I just described a flight from 1999 - know...
The solution is to 'hold' the AC on the ground until you have good ground speed - and then gently pull back on the elevator and then off you go.
If you like Old Slow WW 1 AC - it is just fine - it was not the AC for "ME".
Good Luck.