Join Date: Dec 2010
Location: Modbury (Adelaide)
If you study the homologation documents, they the 'Alfa factory' had to have made the cars first.
So as to answer your first question. Yes the cars were typically made prior to homologation. FIA 1576/3/2V was an 'invariata', a variation to FIA 1576 making the aluminum doors and boot lid available from 1st Jan 1970 for a 1750 GTAm.
Your second question about alloy bodies being legal for GTAm in their race series.
Certainly race series existed, but so did the allowance for group 5 and 6 cars, see Angelini's race programs.
In 1969 the 1750 GTAm was homoligated in Groupo 2: Turismo (1000 samples) and the body was steel as you point out, the teams could not change it in 1969 to aluminum if they ran in Group 2. They had to wait until 1st Jan 1970 so they could change the doors and boot lid to aluminum.
If they ran in Group 5 or 6 they probably could change the body to aluminum as a private entrant, as to if there was any factory direct conversion to full alloy through Autodelta or Angelini is a good question.
It is well documented that in Australia a private racer did make an all alloy 1750 GTAm, which would have been under FIA a group 6 car.
In 1970 it could be considered FIA allowed a minimum 100 cars to have lightweight coach elements like alloy doors, ...( boot lid and bonnet as they are elements too). What about a lightweight coach element being the body!
I guess you need to get your head around how it all worked, looking at the dates on the documents.
FIA sets rules first, then Alfa factory makes cars to take advantage of new rules. Alfa factory then homologates cars, supplements existing homologations with extra additions (i.e. aluminum doors and boot lid etc ) under the umbrella of the FIA rules.
If there are other members that know more happy to be correct.
Last edited by Steve105; 01-16-2019 at 12:22 PM.