As has been said, easiest is the sierra/pinto as it is a bolt on.
There are other options for injection though although they may may not be so suitable for turbo setups down the track.
All have been done before--
GSXR ITB on modified weber manifold
EA CPi TB fitted on standard 32/36 manifold
Cut/shut injection plenums from other makes. Saab, magna, telstar all been done.
Have a look here -
http://classic-ford.org/forum/topic.asp?TOPIC_ID=18332Shaun