1975 Pontiac Firebird Trans Am

The Malaise Era was well and truly underway by the 1975 model year. At least initially, the 455 V-8 disappeared from the Firebird option list, leaving the 400 cubic inch L78 V-8 as the sole motive source for the Trans Am. Compression had been reduced to 7.6:1 which slashed output to a dismal 185 SAE net horsepower. Standard transmission was a wide-ratio four-speed manual, with optional close ratio…