Question about Escort from IMSA GT

[zoob]

I was checking some websites with IMSA GT results but none is specifying exact model and engine type of Ford Escort from 1974 driven by Juan Montalvo. I attached picture of this car from Daytona Finale (1.12.1974) that I found on racingsportscars.com website. I would appreciate it very much if somebody could help me identify this model.

[FAL]

With those body modifications, I don't think there's any way to know the original model without knowing the engine type.
Likely to be RS1600 (or GT if 1300cc).
Bit late for a TC unless it is 1600cc class (RS1600 was 1601cc). 1100cc and even 1000cc were raced in UK around then.