Sounds like a good idea to me! We have the I80 motor, and have only flown it once for some reason...in a modified AT Arcas. The next flight will be in a AT Barracudda mod. The H70 would be good in anything 1.5"-3" at the most, I would think. Nothing more than 4 pounds loaded.
Keep the electronics bay lite, usually in this motor's case you have to build the rocket around the motor, so the fin can be built light as well. Lite is the key for Ratt Motors.
An extended Lil' Nuke would probably fly well, also. Loc Legacy as well.