leave the heads on, they rarely fail. new lim and upper gaskets and put it back together, do 2 oil changes with a new filter to clear out that bad oil.

you gonna want to add a new set of coolant elbows to the list as well, the top one you found, but theres a lower one as well, its all part of the alt bracket, they sell metal elbows now. if you cant find them the regular plastic ones will work, have been for years. they are found in the HELP section at the parts stores, made by dorman.