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Heated fuel line??


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Hi all, just picked up a one owner '74 620 with an interesting mod (the coiled copper surrounding the modified upper rad hose) which I can only imagine is a cold weather mod..........but the truck was and always has been a So Cal pick up. 

Have anyone else ever seen this strange mod? I can see warming the carb ala aircraft but heating the fuel line?? Fast lane to vapor lock me thinks.....all else is absolutely dead stock.


Strange to me.... lol

-- Ray







Edited by Rays74
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Yeah that is retarded.  The L20B engines have a return line so cool gas is constantly circulated past the carb to prevent hard starts from vapor lock. Even on a mountain top, gas won't freeze. The 620 uses air warmed by the hot exhaust to help vaporize the fuel when cold. That makes zero sense.

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