I don't want to step on anyone's toes. My goal is to make sure facts are provided, that's it. If anyone feels I've made a mistake, please feel free to comment. I do not take offense and if I am mistaken, I will learn something - a good thing, right. So here goes:
1. The underhood photo looks just like my 1974, but it has dual Webers vs my car, which has the original SPICA. It looks similar to my 1980, but there's a difference. My 1980 has the battery in the trunk and the air cleaner on the left side. The original battery hold down looks to be missing from this car - I'm not a fan of the original, as it's very close to the battery terminals.
2. The 1971 style rear bumper fits tighter to the body than the 1973 style. The 1971 has license plate lights on the bumper. The 1973 has license plate lights mounted next to the plate and has rectangle rubber pieces on the bumper.
3. The 1971 front bumper does not have the rectangle rubber pieces, where the 1973 does. I'm not sure if the 1973 has the grille guard - the 1974 does.
4. Console and dash in blue is not original to 1973, therefore was added by a previous owner. It's not the same as my 1980, which has a digital clock and a green blower motor switch. The round hazard button puts this at a 1979 or older.
5. Replacement speedo is an 85mph version with those lines after 55 mph (same one my 1980 and 1983 Spiders have). 1973 had the 140 mph speedo.
6. Replacement tach has those lines after 5600 rpm vs original had no lines.
7. 1982 was the last year of those big, heavy rubber bumpers. 1975 was the first year and they were on the US cars, where the Eurpoean cars had the stainless steel bumpers. 1983 had the new bumpers with the larger Alfa Grille and separate front right/left bumpers. Front bumper swept around to front wheel well. New rear bumper that started at back of rear wheel well and wrapped around the back of the car. Top of bumpers in metal and faces in black. Big rubber 3 piece spoiler, new for 1983. New front air dam. New tail lights too. Designated S3 version.
8. 1982 car came with the new side mirrors (painted to match with black surround). This car has the 1982 and up mirrors.
9. CA emissions testing is required on 1976 and newer cars. 1975 and older are exempt from testing, however IF a 1975 and older car is modified (original CA smog equipment is removed), the DMV can refuse to register the car. I don't know anyone who this has happened to, but it's in the California Vehicle Code.
10. Many states require a safety inspection (brakes, lights, horn, tires, etc) or registration/stickers are not provided. CA does not, however it does only when the vehicle has been rebuilt or is a salvaged car. A brake and light test is required and must be done at a state approved shop.
11. Rules in CA are very lax, unless enough complaints are received by the government. The state officials deem that "safeguards" are required and stringent laws are passed - it goes from the "Wild West" to "over restricted".
This Alfa is a hodge podge of a few Alfa Spiders. Dash, console and seats from a mid-late 70's Spider (my guess), bumpers from a 1975-82 Spider, body is a 1973 and mirrors from a 1982 and up Spider. The seat looks to be leather vs vinyl.
That's it, just my 2 cents.