It will be faster and stronger but I wonder how some fine details will work. Also, the corners are usually quite bad with big nozzles (at least from my own experience with 1.2mm nozzles), so there will be a lot of rework to do, especially for the central carriage, which needs to be very precise. You can try on a few parts and see how it comes up.
There is no point of using a 0.8mm nozzle if you only do 0.2mm layer height. You can do the same layer height without any problem with a .4mm nozzle, so if you use a .8mm nozzle, set up your layer height to 0.35 mm at least.
Also, I recommend you to use PLA for those parts, ABS is too soft, you want something rigid here. Do not even think of using something else (aside from carbon fiber, maybe), you’ll just waste time and material.