[BR3W CITY]

"technically" speaking the way to do it would be to lift the cab off the mounts and run the fuel lines OVER the frame, which is more common on late model trucks that don't have full C or I channel frames.

I have my fuel running on the inside of the passenger rail, ~4" or less from the exhaust. Its liquid fuel under pressure, not vapor, so the exhaust heat isn't a threat. Your not going to boil fuel unless you set the damn line right on the exhaust. If you REALLY think that your getting overheated fuel, just put a fuel cooler on the firewall (I've yet to see anyone NEED to actually do that).

Heck, Honda guys still think pre-heating fuel is good (half joking, but check out some of the late 80's early 90's imports running fuel pre-heat....they like to blow up).