Hi guys I'm pretty new to the gti (although I've owned a couple) but not new to vw

currently own a custom t25 a custom roof chop beetle and a bay window. So I'm hoping you guys can help... I've searched the FAQ and forum as there's lots of info about converting a 1.8 8v to 2.0 8v but the bit I'm stuck on is the dizzy I know I need a 2e but when I'm ringing to buy one there telling me there is 4 diff ones? 2 pre 94 and 2 after 94?? I guess it's the pre 94 as need the early 2e but that still leaving me with 2 to choose?? Does it matter which? Part codes ect would help? Any info cheers...