It looks to me like you would be under-specced with that combo… although it certainly might WORK, and be totally fine.

Alternate suggestions:

The new Truetone CS-6 should DEFINATELY fit under a Templeboard…. if it has enough juice for your setup. 

I (and others) use a CS-7 with my H9, and it is flawless. . . and would PROBABLY be doable on a templboard….but maybe not. 

e.g: https://www.thegearpage.net/board/index.php?threads/temple-board-w-truetone-cs-7-power-supply.1893910/

For reference: Heights:

Powerfactor: 1.75″

Cs-6: 1.22″

CS-7: 2″