My man at GSF car parts was telling me how the Auto Factor's car registrations, work on their web sites.
Apparently there is a list of "Technical Document numbers" and each one references a different engine & car type.
For the 1986 GTA Turbo, the tech doc number is 6175 and there is the 185 and 200 bhp variants, (185 is the Le Mans)
He was able to use the 6175 to cross reference other parts catalogs.
I just thought this may interest some folk if they did not know and were looking for parts in auto factors.