4 wheel drive vacuum lines question

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I've either got to fix the vacuum lines or modify my vacuum motor for the front axle as I don't have 4 wheel drive.

I've read through many articles about modifying the Vacuum motor for the front drive shaft. I'm curious about one thing, If I do the modification to do either using a cable or just lock it in place, is there any need to keep the vacuum running to the transfer case? Obviously I haven't research this but though maybe someone here might know.  I was thinking if I didn't need those lines  running back there to transfer case I'd just remove them Cap off the vacuum going to it. Then replace the switch with electrical type switch and run the wires back to the cab and put an idiot light on the end of it. It really wouldn't do anything other than look cool and let you know the transfer case is in-gauged.

 

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