3a distributer

[gti]

hey, i have a 92 vw gti 2.0 16v engine code 9a. i have converted it over to
dual sidedraughts (dcoe style). i need to put in a non electronic/computer
controlled distributer. it is a 2.0 block the vw 9a. my question is does
anyone know if the 3a cog is the same? i want to use audi distributer 049
905 205Q. there is a place that sells a adapter to use a 1.8 distributer
with the 2.0 3a which would open my options but i simply do not know if the
3a is the same bottom for the distributer swap. also any suggestions on a
mechanical 2.0 or 1.8 distributer is appreciated. thanks.