With my custom twin core rad, I've only got 35mm odd clearance between the rad & the motor.

If I strategically place a 10" fan it will go in at the bottom of the rad, but I'd still only have a couple of mm clearance between the pulleys and them.
Is this sufficient to allow for engine movement, or doesn't the engine move back & forth too much, just sideways?
Maybe I need a different radiator. Any suggestions?
:???:
