Navaleye,
110 x F-4F were upgraded under the Improved Combat Efficiency (ICE) program which was completed in 1992. The main changes were introduction of the APG-65 radar (as in F/A-18 Hornet) and AMRAAM.
Several alternatives to ICE were considered - such as short-term gap filler purchases of other aircraft types until Eurofighter was available - but ICE was considered the most economical and ended up enabling exactly the plan that was intended.