I live a few miles away from Spring Valley and this past summer I was out for a ride on the Harley so I came back by the track so I rode back the lane(the chain was down) and there was no one around.
I raced the first year they raced there. It had something to do with Malverne being shutdown for a season or two for land issues or something like that, and they had to go somewhere else. I might be mistaken, but that's what I remember back in '87, I believe it was. I still have a VCR tape of racing there. And yes, I still have a VCR!