In returning my 1994 mustang to its (basically) stock configuration, I have noted some differences in the drive belt lengths recommended. In the common routing diagrams found on the internet, the stock length is listed as 104.5". I called Ford and they recommended belt JK6-1063, which as I understand from the designation number is 106.25" long. The belt I got at O'Reilly was 88.125" long, as listed for a stock 1994 GT. Why so much disagreement?