cooling question

My 416 in my 72 swinger is always running at 200 to 215 whether I am idling or on the interstate.
It has aluminum heads and a 26" aluminum rad. I am using a 17" flex fan with a shroud. The fan is 1" away and halfway into the shroud.

The motor is 540 hp and 14 degrees timing. I am also running a/c but that doesn't seem to affect the temp any. 195 stat. I am using this because the efi people said I should.
I have the factory 18" 7 blade clutch fan yet, should I be using that or get a bigger flex fan?
Thanks for all advise.
Author: admin