The gear on the right is on the end of the camshaft and comes out when the camshaft is removed. The big gear to its left is an idler which turns on a shaft fitted very tightly into the block. This gear and shaft should be removed from the block prior to rebuilding the engine. The gear on the oil pump is just barely visible on the left of the big gear.
Luckily, Ford provided a 3/8 inch threaded hole in the retaining shaft. There are pullers made for removing the shaft and gear, but I use a piece of hardened all thread which is screwed into the hole. The all thread is fitted with a nut and washer a comfortable distance away from the engine and the slide from a slide hammer is between the engine and the bolt and washer.
It is then necessary to find an old geezer to work the slide hammer. A few whacks and the assembly pops right out. I put down a sheet of corrugated cardboard (OK, it's a flattened out box) to catch the gear without denting it if the assembly comes apart on its way out. Can you tell that my garage is unheated?
