sorry i meant reach too

the pads in the brakes he has are already at or close to the closest position in the slots
a longer reach brake will not work

it is a somewhat common misconception that long pull brakes can make fatter tires fit on a bike with short reach brakes
but this is not true at all
the tire clearance is mostly determined by the frame or fork

due to the different construction of different brakes
you may be able to add or remove a mm or two of clearance
but not more
the op might be able to increase his front clearance by changing the setup of the brakes he has
as one of the arms is down pretty low

brakes must be selected to match the distance between the brake mounting point and the rim

if you replace a set of short reach brakes that work properly
with a set of long reach brakes
all that will happen is that the pads will not longer be able to contact the rim