Hm... I don't really wanna share this info, cuz I was planning to do it on my FRS/BRZ, but o'well
First measure the top & bottom length of the emblem and make a perfect 86 emblem size that fit (top to bottom). Use bondo or other stuff (like ABS or PLA) to fill in that whole emblem spot... except have a lil bit of dip, so 86 emblem fit nicely. After Everything test fitted, glue, sand, pain the ABS/PLA that cover the emblem. Paint the 86 emblem to silver/chrome or whatever color you like and done.
Yeah, it's extra work, but when it comes out, it's pretty nice. I've seen done w few different cars.
