What can I do to make my 318 faster

Agreed! Other things that the 318 going fast start to cost money and there a bit expensive if you wanna do it right and done well.

Things like'

Gear ratio change .... and boy that helps!
Hi-stall converter ... off the line help
light weight parts .. all around help.

Engine upgrades after bolt on parts and a cam;

head work which would include;

head milling, (Not much required)
up grade in valves and sizes, bowl porting

By the time you get into doing it, the 360 may be a better venue to travel.