170 hours on k8 are too much,cadets who fly k8 in AJFT and FCU may reach 100 hours on k8 but no chance for T37 riders.
Secondly,100 hours on f7/mirage are too less to go to F16/JF17,people usually go there when they are senior Flt Lts or Sqn Ldrs.Only * Flying Officers were sent on F16 right after EFCC(probably for the 1st time in PAF) 2 years back and NONE has been sent on JF17 after fcu or even with 100+ hours on f7/mirage,only Sqn Ldrs or senior are sent on JF17.
Even if u are an F16 pilot doesnt mean u'll always remain there,F16 pilots have been posted on mirages,k8 and even Helis.