Donnie, you could use a stepper motor to move the barrel valve, instead of a boost actuator. Stepper motors can be controlled to a VERY finite movement. That would probably be a better way to control the fuel curve.
I really think that -10AN lines are too big. They will have to be pushing the gravitational forces of one G (at launch). I know most people think that bigger is better, but most Sprint car guys around here run Methanol and 750HP through one -6AN. The pump has to fill the hose and fill the nozzles. I think that two -8AN will still be over kill after the pump. Feed the pumps with -12 or larger, though. Front mount the fuel cell, too. Better way to feed the engine. Electronic pumps don't make good sucker pumps, so let gravitational forces work in your favor.
We use to use big electronic aircraft pumps to feed our 5,000+ hp V-12's. I can get a manufacturer and number if you think you NEED huge volumes. I mean HUGE volumes. We used one pump and it fed both the pressure carb ( a PR-100 off of a R-4360, with one BIG nozzle that sprayed into the supercharger) AND a nitrous sytem that we would empty 150lbs. of nitrous in 4 minutes of racing.
(Man I HATED filling those bottles!!!) We would also go through 65 gallons of 115/145 AV gas (with a special addative that would drop you to the floor if you breathed it.....ask me hw I know THAT!
) and 25 gallons of water/methanol (ADI) in about 4 minutes. We had (5) 30lb. bottles of nitrous in the boat, and they would be empty after every 4 minute race. The driver would only use the nitrous coming out of a turn, but the boat would accelerate from about 100mph in the turn to 220mph at a push of a button. The boat would walk 8 feet sideways (with only 1/2 the 15.5" prop in the water). Here is pic of the props we used. They only cost $10-12,000 EACH! (back in 1985)
I remember the UPS guy dropping off 10 of them one day. (thank God I wasn't writing the checks for them.)
Here's a pic of one of the pistons and the blade rod/fork rod of a Griffon, and a melted piston from a nitrous valve failure. (the fuel valve shut off, but the nitrous valve froze open.)