(from page 1 of the 1975 Collection)
Looking under the hood we find a 97hp (171ci 2.8 liter) V6 engine. A Rallye package was available for this engine and the Mach 1 which included Traction-Lok differential; 195/70 raised white lettered tires; an extra cooling package, bright exhaust tips; competition suspension; dual color-keyed, remote-controlled outside rear view door mirrors, leather-wrapped steering wheel; and stylized steel wheels with trim rings.
(from page 2 of the 1975 Collection)
The 1975, Mustang, Z-code, 105hp (at 400rpm), 170 cubic inch (2.8 liter), 2 barrel, 6 cylinder engine.