How upgraded are Iran's F-4's now compared to the originals?
There are two identifiable upgrade programs for the F-4, the Zam-Zam 1 and Zam-Zam 2, in 2001, 50 airframes were rebuilt and strengthened. Avianics were also upgrades, but no specifics are available. Multiple different munitions were also integrated, supposedly
including the R-73, also confirmed a range of A2G munitions.
While not official position, its my opinion that the F-4's in the IRIAF are being converted to bomb-trucks with limited A2A capability, the upgrades you see and will see are all going to be things like targetting pods and advanced ground attack munitions instead of a new radar or integration of the AIM-54's.