Don't know about the old airport...Next time you go take a ride over to Keaau and look up Doc Stanley, he runs a small engine repair business and sent me a Shindaiwa 4 stroke to convert..He knows the flying fields on that side of the island, not that far away..I think you can still get there over the road past the volcano house...Or take the saddle road and go through Hilo, don't forget to stop at Hilo Hattie's factory for some shirts...And send me some Macadamia nuts