Soooo here's some stuff to consider.

#1 At Advance Auto a lower conversion gasket kit has front and rear covers, water pump and oil pan gasket for less than the pan gasket by itself.
#2 Please, change the rear engine cover gasket. These are known to seep and cause plenty of other issues.
May as well do the front timing cover gasket, water pump, valve covers, LIM's etc and the rear cover then pan gasket while it's out.