Fuel Line Rerouting

I would think that you could get the fuel line from the pump to the top of the manifold from underneath. At worst take out the alternator ( 2 easy bolts) as it routs up, behind and to the drivers side if the alt brakets.

Then the upper "S" shapped part should not be a problem.

If you have a leak from behind the AC pump my bet is it's the fitting on the carb or the upper "S" piece attached to that fitting.

The fitting is a bad design, the "S" shaped line puts counter clockwise torque on it, and mine have always had issues not loosining. Not to mention there is a gasket that you can not tighten the fitting too much or you crush it and start a leak there too.
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Stock routing with no AC

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