have a look at the top, if it has a load oif rods on its an 020 rod shift, if it has 2 cables its 02a cable shaft. unlikelyt to be a cable shifter if its a boggo valver though. If its a rod shift get yourself a bog std MK1 GTI rebuild kit, they're all the same. Though I guess it could have MK2 linkages bodged in? got any pics?