All Ranger clutches are self-adjusting in that the hydraulic 'linkage' takes up any slack developed by clutch wear.
If you order the 'expensive' clutch and the 'less expensive' clutch, with the option to return the one that does not fit, you should be set for a replacement affair.
As Ron sez, the clutches are the same for the 2.3/2.5, and I think the flywheels are the same also. The 2.3 had a turbo clutch available for the T-bird and Mustang SVO that cost a pile more than the 'standard' clutch. The turbo would eat the standard clutch, but both would fit to the flywheel, and function more or less.
If you kept the paperwork for the last job, the parts should be listed, or you might check with that shop.