I would still cover the fuse box with something, even a plastic bag with some tape temp to keep any moisture or fine debris away from entering the box. The engine cover is just for looks so you can keep it off permanently if you choose.
CRAZY BEE - IOM 2LT/RS (more)
Cosmetic Mods - 23 | Performance Mods - 14
ROTO-FAB CAI - DT HEADERS - CUSTOM 3-INCH PIPE EXHAUST - RES DEL - R-CATS DEL - MAGNAFLOW RES X-PIPE - 91 OCTANE TUNE - FULL ADM KIT - PORTED IM - PORTED TB - PORTED CH - BLACK 3/8 ISOLATOR - TRIFECTA TUNED