From what the paperwork says when I bought the car, the engine was rebuilt to stock specifications in 2005, by a shop in california, but when contacted they don't keep records going back that far, but by the way the car ran when I first got it, it is stock, no cams, and such.
As for idle, I have had it up to 900, it will still stall. Idle mixture screws are another matter. right now I have both at about 2 1/2 to 3 turns out for the smoothest idle at about 16 to 17 in. of vaccum.