454c10- i actually already have all the parts... i went with the air gap for the the cooler intake temp and also the longer runners. with the longer runners the velocity is increased and thats the main "feature" of the vortec heads. Thats also the reason for the poly carb spacer...
as for the extra fuel cell, i was thinking something very similar to doing that. but i was curious just a electric fuel pump in there? and it only turns on when you arm the system?