i am putting in new gas tank , in a 73 challenger ,has 4 vent tubes in front of tank , i dont have a line to front for vent or vapor canister , is there a way have some type of vent on the tank or vented cap that i wouldnt have to run a line to front and add a vapor canister? can i run this with out a vapor canister ? any ideas on setting this up would be helpful , thanks brett