If it’s a big block you can use the same mountingbrackrt from 440 motor homes. It bolts to the rear vally pan rail and is made for the box to mount to
That space is already taken on mine..
'63 Dodge 330 11.19 @ 121 mph Pump gas, n/a, through the mufflers on street tires with 3.54's. 3,600 lbs. 10.01 @ 133mph with a 250 shot of nitrous an a splash of race gas. 1.36 60 ft. 3,700 lbs.
