The Merkur had a turbocharged 2.3 Lima with a T9 behind it. So now I guess that all T9's in the US have an input shaft for a 2.3 Lima engine.
LTFM, I'm sorry but I don't think you will be able to find that donor car in the States, it is a European Ford Sierra, the bodyshell is very much like the US sold Merkur, but in Europa it was available in many body styles, with carbureted 1600, 1800 and 2000cc Pinto engines, and 2000cc Pinto EFI (and diesel!).
The factory EFI head is said to be flowing as well as a stage 2 tuned carbureted head.
Stock EFI was 115 HP, later they were detuned to 100 HP for emissions by lowering the compression.
In the US it might be an idea to just get a Pinto specific throttle body set up, or make one up, and then find a 79 or younger fuel injected Volvo 240 B21F and scavenge all the electronics, ecu and sensors from that. The Pinto can be bored to a 2.1 too if desired.