You seem to have the long generator (not powerhouse.) Original Ford design was for the single bolt to be (ahem) VERY tight and this would be enough to hold the generator belt sufficiently tight.
Real live driving has shown the weakness of the design and most of the Model A supply houses now carry an "auxiliary brace" which can be used on the timing gear bolts to hold the generator in position. I would venture to say that most "drivers" use this brace.
As to the sediment bowl, you don't say if you have the glass bowl or the cast iron bowl.
The glass bowl has (usually) a fine brass screen up in the top of the glass bowl held by the glass.
Likewise the cast iron - a cylindrical screen pinched between the lower screw cap and the interior passage at the top of the housing.
Some parts houses sell aftermarket filters which fit the glass bowl. My repop glass bowl (back in the late 70s) came with a spongy ring inside (which has now deteriorated and I deleted it.) I have not seen anything aftermarket for the cast iron version but would not be surprised should they exist.
Joe K