I dont entirely understand this post.
Are you putting the Corrade G60 front brakes on the back of a mk1?
And where's the question?
I am familiar with the G60 (Corrado, not to be confused with the Girling 60 calipers from an Audi)
brake upgrade for Mk2/Mk3 4 cylinder,
but have little experience doing the kit on a Mk1.
(The reason I was looking here, I just got a full set of brakes for my 85 TD:
Corrado G60 fronts, and Mk3 rear discs...)
-Brad