Hi all,
Thanks for the great feedback and insights. I absolutely understand there's no "premium" for the car, it's more about just understanding this interesting (but flawed) piece of Alfa history, I think the 25 homologation specials do have a interesting place in Alfa Australia motorsport history.
The fuel tank is the standard AM/USA tank, however it's the extra tank splitter that is interesting - there's no lower tank fitted, but it looks like it's had one.
The engine is definitely not a SPICA, the prior owner swears it originally had a spica engine but it was swapped out in it's entirety, the car however has all the ancillary spica related stuff such as the cold start cable, fuel pump, fuel return line, fuel pres reg mount etc
I was also thinking it could have been an extra, ie they built 26 or 27 just in case, but asked for 25 compliance plates and attached the plates to the first 25, then std GT plates to the spares. Given the urgency of getting them here it's not unreasonable to think they brought an extra. Its a theory.
Another item of interest (I'll post a picture) is that its fitted with an old (period) single mount race harness along with the standard seat belt on the drivers side. Now, not trying to fuel the "its an old Group C car...fire) it's just another interesting feature that may help identify it.
Again, thanks for the input.