Yes, I am contemplating the idea of having a 99' Bumper (For that updated front turn signal look & Liscence plate holder) but was wondering if my R1 Lip would fit on it? Are the holes in separate locations since it's designed for the 99' Lip? I prefer the rounded synchronization of the R1 lip over the Flat/Uncurvey JDM 99 Lip lately...just pondered the idea (pics would be great!)

 

The holes are in slightly diff locations, and the shape of the 99-bumper is slightly different. When you put a 99-lip on a 83-95 fd, the corners stick out a bit (or the back end by the tires, your choice).
Also, you'll have to break off the little tabs on the r1 lip, I'd imagine...