Your oil pressure switch is on the journal (not pre filter like the 01-02s). The pressure when hot WILL drop below this 19psi you have it set for. I would reset it for 14psi. This is the lowest I would want to deal with. Mines been down to that (14psi) with with very hot oil. The hotter it gets the lower your pressures will be because of this. The oil starts running more like water than cold oil when hot. If your worried about it, get a multi grade oil like a 5w-50 or 20w-50 (the latter is harder to get flowing in the cold though if you ever deal with this). This will help.