they never had air pumps to begin with. why would they need one now?
the other question is, were they ever allowed to be sold in CA. to begin with? they were not allowed to be sold in some states from a lot of things i've read over the years. something about the exhaust. i always...
i've had two 79 LRE trucks over the years. both very original/ no air pumps.. they did have some kind of air pipe to the rear of the passenger exhaust manifold.. i forget where it hooked up to though... as far as the cats go.. they are over 40 years old. probably shot any way..