Fuel Cell location.
 

Both "HRA's" require a rear "fire wall" if the fuel cell is in the trunk.

What is required if the car is a stationwagon?

Re: Fuel Cell location.
 

You can mount it in the spare tire well, if it has one and install metal cover over the well. .......A flip latch access door is acceptable to get to the fill cap. ........You could also do it the way many Vega and Pinto racers used to do it by fabricating an aluminum enclosure around the cell, with an access door. and sealing it to the tail gate. ...... .All the hoses must be inside the enclosure, and the vent must exit outside the floor. ....Tom