The GX engine in our Coupe came from Japan in 91 (one of those 30K motors). When I thought we would have some Tarmac Rally in our neck of the woods I installed the H-Prod head, we have to get 68 and newer cars smogged in Vegas. The GX parts went to Finland. Fortunately I found another one, as GX parts were used on a whole host of A series powered cars they are still somewhat easy to find.
I've always bought parts in lots and have found about half the items labeled GX to be something else............still quite useful but not GX. I'd love to have a genuine GX coupe but at 20K you'd really have to want one. With all the 1200 stuff available now, half the money would buy twice the car, of course it would have no collector value.....................but a collector 1200, please don't spoil my fun little car with collector value (leave that for the Z crowd).

Tom