@Wayne S you are on the right path but making some questionable choices. Running it on 7.4V, you might as well just get a 35mm fan (alu), they are ~ double in price or take a look at the one I have linked below. It's 36mm and doesn't need any mounts.
You are restricting airflow with that mount.
There is no gap between ESC and fan. You will need roughly 1/4" for the fan to actually work and do something useful.
My guess, overall you are at ~ 20-30% of what this fan is capable of which is probably less or equal to a 35mm fan.
The current is rated at 1A for 12V, my guess you will be ~ 0.7A which is ok for the BEC to handle, good choice from that point of view.
Most RC car fans at higher price make the same mistake during mounting and all that power is not used for cooling..
Different story when you power this on 12V but with no gap you have back pressure and you will be at ~ 50-60% of what the fan is capable of.
By all means try it out and see how it holds up to bashing. I have found that landing upside down will damage the motor on the one I have linked below (12V fan). They are cheap enough for this to be a don't care.
It doesn't appear that there is anything supporting the center of the fan motor itself now that you raised it up. In the research that I did, not having any support under the motor is how the majority of the motors broke when coming down from a big launch, hence why those Alza mounts have the center support in them now. If you're going to raise the fan, I would suggest putting the spacer under the mount instead of between the mount and the fan.