Well, there is a sticker on the front of the valve cover. You can also decode the VIN on the block, but that doesn't mean it's right. Nor does the VIN on your dash. Parts get changed by owners. 22re means fuel injected. If you have a carburetor, it's a 22r model. If you have fuel injection, it's a 22re, or possibly a 22rte which is a turbo, but I doubt you have a blowerhow do i tell if my 87 is a 22r, 22re etc...?