mounting an electric pump

Bulkhead between trunk and passenger compartment of .030 steel or I forget aluminum.
Trunk has to be sealed from driver's compartment to pass tech when the battery or fuel tank in is the trunk.
3/8ths " hold downs on batteries in non stock locations.
Battery disconnect when battery is re-located.........must be clearly marked for direction of " off " on rotary , and push to " off " on push pull switch.
It will really depend on the track and your car's expected E.T. for how close they will scrutinize the car. If it looks real fast , they typically pay more attention.
The pump isn't the deal breaker as much as the tank or cell location.
And some tracks are real sticklers for the rule book........some just take your money and let you race.