My AC compressor is seized . It has a 4 groove pulley with the DKS-20DT compressor. Everywhere I look says it should have a DKS-20 copmressor with a 6 groove pulley or a different combo.I looked and the 2015s had the 4 groove with the dt compressor. What is the DT difference in these compressors?
What is the Ambient temp speed pack as well?

 

Found out the DKS-20dt with 4 groove pulley should be for a 3.7 engine that year. Would Ford mix compressors like that?