When you get a chance, have a look underneath at the transmission bell housing. The e30 M3 dogleg transmissions had bell housings that bolted onto the transmission where as the getrag units used on the standard M10 engine's, the bell housing was cast as part of the transmission case. If you see that the bell housing is bolted to the transmission, you likely have the dogleg. If you do, go and get that S14 you were telling me about!
Welcome to the forum,