Carter electric fuel pump mounting/orientation?

So I just bought a Carter 4594 electric fuel pump for the Cuda.
Looking to mount it outside the subframe to get it away from the exhaust heat.
There is room for it in the small space in front of the right front leaf spring mount.
It would fit with the motor up/pump down OK, but it fits REALLY good on its side.
An internet search shows them mounted motor up and motor down about equally.
Anyone ever mount one on it's side??