Also remember that the regular black fuel lines and such are attacked by heat. I located my fuel filter under the cab just outside fo the tank, that way I have "clean" fuel from the tank outlet through the rest of the system.
I always wondered about the fuel filter 5" above the exhaust manifold. My 49 3100 came with a carter filter/strainer mounted to the inlet of the W-1. It get's hot. I think it makes percolation worse. But it looks good and I can see it easily.
