I have looked in me book of ford carbs for 78-91, it is not listed, but sure I have heard of it.
I seem to remember it as a later xr2 carb, with vac secondary, but might be confusing it!!
The only advice I could give is maybe speak to RON KIDDEL, at the carb centre 0208 348 4218.
It will almost defo require rejetting due to mods so might be best just to book it in somewhere.
tabetha