How rare is a 1970 Grand coupe

For 1970 and 1971, the Barracuda and Barracuda Gran Coupe had two six-cylinder engines available — a new 198 cu in (3.2 L) version of the slant-6, and the 225 — as well as three different V8s: the 318ci, the 383ci with 2-barrel carburetor and single exhaust, and the 383ci with 4-barrel carburetor and dual exhaust 330 hp (250 kW) SAE gross.

a wikipedia cut and paste