Update February 7, 2013: This Carrera sold for €77,050 (approx. $104k USD) including commissions.

Posted January 10, 2013: Bonhams is auctioning a 1975 Carrera MFI 2.7 at their Paris, The Grand Palais auction on Thursday February 7th, 2013. This will be interesting to watch as it has been at least a year or two since a Carrera was auctioned by a major auction house.

There are a number of details that are incorrect, but they mostly are easy to correct. Some examples of the details include black fuel tank instead of original gray; headlight trim rings painted on black trim cars starting 1975; chrome mirror would have been black or body color in 1975 for black trim cars; later silver ignition coil; replacement window with later style mirror mount. These aren't difficult to fix. However the orange side marker lights on the front quarter panels were not introduced on Porsche until the 1980s, this would require removal, patching the holes, and repaint of those panels. The Carrera side script is also positioned higher than it should, but as this is vinyl it can be removed and easily added back. Not knowing all the original options on the car it could also be that black window trim was installed later and the chrome mirror and front trim ring are original to that car.

If you are looking for a Carrera MFI 2.7 this is definitely a car to have on your radar. My prediction is this will blow well past the estimate as few cars sold anywhere near this level during 2012.
Description for Lot 508:

1975 Porsche 911SC Carrera 2.7-Litre Coupé
Chassis no. 9115600452
Engine no. 6650563

The legendary Porsche RS resulted from the factory's realisation that the weight of its top-of-the-range 2.4-litre 911S production model restricted its development potential for racing. Therefor, it was decided to produced and homologate a special lightweight variant for competition purposes. The result was the Carrera RS (RennSport), which featured thinner-gauge metal in its doors, roof, boot lid, floors and even in the gearchange platform.

When the homologation targets had been met, the lightweight RS was discontinued but the Carrera name continued on Porsche's top-of-the-range model, which in its new, series-production 911SC form mounted the 2.7-litre, 210bhp engine in a full-weight, fully trimmed bodyshell. The tail spoiler was an option and its absence from this car only serves to emphasise the understated elegance of the 911 Carrera in unadorned form.

According to its accompanying Porsche Zertifikat, this car was originally sold in Italy with the following extras: Grand Prix White paintwork; black 'Carrera' side lettering; and a sliding steel sunroof. Recent works, carried out in the autumn of 2012, included overhauling the brakes and fitting a new alternator, wheel bearings and tyres (invoices available). Said to be rust-free and undamaged, the car at some time has been repainted in its original colour. The black leather interior in described as in very good condition and both the gearbox and electrics are said to function normally.

This highly desirable and increasingly collectible early 911 Carrera is offered with Austrian Einzelgenehmigung and the aforementioned Porsche Zertifikat. 

Estimate:
€55,000 - 65,000
£45,000 - 53,000
US$ 72,000 - 85,000