rite guys and gals be nice im normally in the mk4 section pickin up a mk1 cab w reg was a 1.6 lookin at puttin a 1.8 gti 16v think it be the kr lump

how much of a mission is this goin to be what will i have to change ie ... brakes drive shafts ect ??
also what bout the wiring is this easy??
im goin to try and find a cheap donor car so its all there
cheers for the help in advance
lee