Location for mounting system

1. How far can hydrogen generator be mounted from engine intake? Would like to mount generator & reservoir in bed of pickup due to restriction under hood for mounting the system

2. How corrosive is the KOH solution? Area available under hood is close to electrical connectors.
3. Does orientation mater for mounting the generator?
4 how much heat will the reservoir stand? The exhaust manifold & Turbo generate a lot of heat?