How do I tell 1jz from 2jz
 

I just bought a 1987 Supra off a guy. It's pretty much a drag car. It has a custom made valve cover for the engine it has. I'm not sure if it's the 1jz or 2jz. It's been swapped to a single top mount holset turbo. I'm including an engine pic to aid in someone helping me. Nevermind, it won't let me. Any info would still be helpful. Thanks