help with over heating

hi all

need help I bought a champion 22'' rad last falls
I install it maybe 2 months ago was impress with the fit
and also install there 16'' fan

but now I have an over heathing issue
I fabricated a shroud to cover all the rad
but do not hel help

should I buy some kind of rad additive
or what
the timing is at 30* total
165* thermostat
mopar performance 8 blade water pump

HELP
thanks Bob