The jet car conversion was Art Arfons and it never ran on water,thankfully.
Craig Arfons boat was a stretched Deaver drag hydro and his boat pic is attached.
The 345 mph mentioned for" Spirit",was a terminal speed at the end of the backup run.
First run 305 mph.
Backup run 329 mph ....(Radared at 345 mph exiting the traps)
Average speed 317 mph.