If you will remember the standard official method was to drop the transmission mount and engine mounts to get to those plugs til mechanics with more intelligence (GOOD SENSE) than the design engineers started to drill holes in the fender well and use long extensions to get to those pesky plugs simple clamp on repair to the fender well hole.
It makes sense that your father worked in a Ford shop and has a bunch of oddball tools . . .
During a conversation Ford mechanic friend once told us that he thought ford design and snap-on were in collusion because it seemed that every year they had at least one model that required a special tool and one company always hd them.
One of my past Nissans had a double angle on the oil filter. Once ya got used to it it was no big deal . . . BUT until then it was a bit frustrating especially since they had moved it fron the open side of the block (base could still be seen in the casting) to up under the AC compressor
