As much as it fits, not critical. Takes some time while it pushes the air pockets out of all the spaces. Be quick about sliding it on to prevent spillage! Of course put some atf or lube on the new front seal beforehand
at least a quart Ron - IT helps keep it lubed until the pump catches up. I don't like wearing a face full so I don't go full - full, unless you are luckier than I at poking and hoping! ;>) Sounds like you are almost ready to heat 'er up for the first time!! WEEhoo -- Keep us informed!