Those washers installed underneath - through the wood floor - will not hold the machine in place in a crash. Need much larger backing plates, preferably welded to the frame rails. Bolts have no grade markings - they are common hardware store grade 1 or 2 bolts (very low tensile strength). - need grade 8 hardware!
Fuel and electrical lines run through the drip pan - sharp edges - no grommets or bulkhead fittings. The fuel line here is on the pressure side of the pump, and will spray fuel everywhere when it chafes through.
The fuel pump should be installed on the inside of the frame rail instead of the outside where they put it. Where they put it a blown tire will tear everything out as it flaps around.
Okay that's three...
This is a very unsafe installation imo.