MK III Questions

hey, ya'll I just got my self a VW Golf III, just cuz every1 else got Hondas, well my question r the following..... Im interested in purchasing a performance clutch but they always ask for my Chassis # n i cant find it, it seems that in '94 there were 2 different chassis for the golf/gti, one chassis # ends with 600 the other with 601, my car was made on 01/94 "in mexico" would that make it a 600 chassis? and is it possible to put in an Audi or Porsche engine in this little beauty?? if any can please let me know, n feel free to put up links, Thanks.