A few years ago I asked some questions here regarding my '53 Ford flathead V8 which was having a starting problem. The mechanic who had my car for nearly a month was unable to figure out the issue and thanks to some here, the problem was identified correctly as air leaking into the line. Sure enough, the gas line connection from the fuel pump was cracked. The mechanic, without having the correct connection, cut out the rubber portion and attacked a rubber replacement hose with clamps. The car starts and runs but I believe it now takes more effort. Regardless, I ordered the correct replacement line which is about six inches long and attaches with nuts on both ends. I tried to loosen the old parts and I was having no luck, fearing the two different metals somehow fused. I have been reluctant to really torque the nut because if I am unable to keep the fuel line stable, I will kink it. I cannot heat it to loosen it because it is a gas line. Other than taking it to a mechanic who may have better tools than me, what other solutions might I try before resorting to that?