Burnt shifter cable today

had a similar issue with headers and my 65 727 shifter cables , in that case i found a thick rubbr fuel line with a same id as the od of that cable . so i slit open that hose and filled it part way with a loctite jelly in a tube , for setting bearing races on spun hubs . its was fluid proff and the added bulk was a insulator , still there today some 30 years back .