The Stovebolt Site Forums The Shop Area The HiPo Shop AN fuel line

Hi folks I have to replace he poorly bent fuel restrictive fuel line on my 63 C10 feeding he single barrel,, I have elected to use AN fittings.. my question is when plumbing this how would you route the new tubing, I am thinking about following the stock or existing route might have a clearance issue between the T stat housing and the valve cover

I'd use SAE instead of AN because the flare angles are different. Might as well use the existing route. Aren't you going to replace the engine with a 292 soon?

Take the same route. How are you going to support the new fuel line? That is a long piece of rubber line.

A piece of pre-flared brake line will be much easier to handle. If you use the newest type of line, you can make very nice bends with your hands, no bender needed. Follow the factory line only keep it high as you pass between the valve cover and T-stat housing. If you are worried about heat, split a rubber hose down the length of it and slip it over the steel line to insulate it. AN fittings will require adaptors at the carb and fuel pump due to the different angles. If you are going for a steel braided line, then use the AN.

"If you are worried about heat, split a rubber hose down the length of it and slip it over the steel line to insulate it."

Joe,

Have you found a rubber hose used as an insulator to be as effective as the shiny metallic heat sleeves?

I don't use either, my fuel line on the 250 runs right down next to the thermostat housing and valve cover and works just fine, it has never vapor lock yet. I would bet the shinny flexible sleeves would do a much better job then rubber, but the rubber would be a cleaner look. The flexible sleeve would need a air gap inside to work properly.
At work, school bus garage, all our Cummins 8.9L and 6.7L engines run on compressed Natural Gas. They run extremely hot and use the silver shinny sleeve material on a lot of the wires and cables. If Cummins thinks its good, it probably is.

, Yes I am and the fuel line will migrate over to the new motor,, that is one of the cool things about AN they are reusable.

When you say "AN", do you mean Aeroquip style braided hose anf fittings? If so, yes, the braided line is available with the SAE flares and is reusable for the engine swap. e.g.
Aeroquip hose and fittings

I don't know, but If the 292 needs a longer line than the 250, be careful not to cut it too short!