Lols,Unfortunately 50s again" has trouble with his spelling. They are "Port" cover gaskets and go on the engine.
The kit is pretty much all you need,although it does not cover the Base exhaust Gasket or the engine seals.
Btw if your unaware "OutdoorKing" is first and foremost a mower parts site. If you like,clink the parts online link up the top left corner and this will take you to the parts shop and most of the parts your looking for...
You will need the gasket kit youve shown,base exhaust gasket,engine seals top+bottom and bearings if required. New piston and rings kits also. Im not fully aware of whats available here,but if youve got any enquiries or get stuck im sure you can contact the site owner BRUCE and he may be able to tell you if its all in stock...Anyways just another option besides Ebay for your parts:)
Personally id get a want list of everything new you need, Ie gaskets,piston, rings, seals whatever,and do a bulk order and possibly even raise a slight discount with the seller you choose?....afterall you got 3 mowers.
