slant 6 gettin WARM

its got 2 - 10in fans. one on the outside blowing in past the condensor and then one on the inside pulling through the radiator. ill get a new t-stat for it, a couple of people told me that. and once they explaned it, it made sense. can i just move the inside fan down towards the bottom of the rad. or do i need to get 2 bigger ones to get the proper flow.