From the listing for this Classic Porsche 356 Race Car for sale:

An exceptionally rare and genuine early 1960s racing 2000cc Porsche T6B 356 Carrera 2 GT.

At a time when Abarth could only slowly produce aluminium bodies for some 20 GTLs, which sold fast, Porsche also produced a very small number of 356 Carrera GTs. During this period, these race versions were mostly 356 T5B-bodied 1600cc Carrera-engined GTs, however, just prior to the introduction of the 904, Porsche produced the ultimate competition version of the 356 – the 2.0 litre four-cam Porsche T6B 356 Carrera 2 GT.

Built on the 356 T6B steel body shell, the GT version was fitted with aluminium doors, bonnet and engine lid. The front and rear bumper overiders were also removed. Plexiglass windows were fitted with aluminium-alloy door frames and frameless rear qtr. windows. A lightweight GT interior featured a wood-rimmed steering wheel, lightweight GT front seats with the rear seats deleted and a steel roll-hoop installed. Under the aluminium-framed bonnet, an enlarged GT tank with 80-litre capacity was fitted with a central filler-neck protruding through the front lid. The brakes were also upgraded from drums to Porsche annular-discs. The 2-litre plain-bearing four-cam Carrera engine was also uprated considerably from the standard type 587/1 130hp GS specification. Through the fitment of Weber twin-choke carburettors, steeper camshafts, higher compression and a 12-volt ignition system, performance was raised for the type 587/2 spec engine to between 160hp. Effectively the 2000cc Carrera GT engine was practically the same as the motor in the Porsche 904 GTS, which would soon follow within 6 months.