I'm with KWKRacing, change to alcohol, cost about the same as 93 octane and your motor will love it.
Mechanical pump yes you have to run a mechacical pump with any type of injection, be it a hat or stacks or toilet bowl. Most nozzles are flowed and rated at 60 lbs pressure WOT and mechanical pumps put out up to 100 lbs at 4,000 rpm's or 50% of motor rpm's.
It seems to me that running a blower on a mud truck cannot be easy, keeping the mud and water off the blower drive belts and pulleys. I've got a 3" Crower stacks injection for a B/BLK Chevy going on ebay this week that came off a mud truck setup for alcohol and nitrous with 8 individual K&N filters. That too me would be a better setup than running a blower especially in the mud, and i run blowers also.
JMO
Zip.