I have three guitars that I bought with cheapo licensed Floyds in which I replaced all with OFRs. The OFRs just dropped in with no problems. But just to be sure before you pay $170+ for an OFR, take badpenguin's advice and measure from pivot post to pivot post.
AXcessories.com has a cool OFR without fine tuners that if I had to refit my Floyded guitars all over again, I would get those. They only cost $129 each, and I rarely use the fine tuners. They only come in chrome, tho. But I emailed Mitchel at AXcessories, and he said they were also a drop-in replacement for regular OFRs with fine tuners.
Here they are