I have a 1970 Series II FHC. There are two fuel line fittings on the bulkhead in the spare tire well. One fitting faces forward and is accessible from the spare tire well. There is another fitting on the backside of the well and it appears this fitting is leaking. I was able to put a 3/4" open wrench on the fitting and tighten it a bit but can't turn it any further because of limited space - can't get the wrench in the proper position. Is there any way to get to the fitting save dropping the differential?!