I am replaceing the tank in my blazer. I have to replace the hoses. It has 4 hoses. feed 3/8, return 5/15, vent 1/4, and a filler neck vent hose 5/8. I can get the 3 smaller hoses, but I am having a problem finding 5/8 fuel hose. what problem will i have running heater hose? I also don't have the charcoal canister anymore, how should I run the vent??I was thinking of running it high on firewall and just putting a small k@n style filter on it.