looks like its the 20r.........check it out
http://www.toyoland.com/cars/celica.html
MORE INFO
http://en.wikipedia.org/wiki/Toyota_...2.80.931977.29
For 1975-1977, the engine for the North American Celica is the 2.2 liter 20R. The Celica GT and LT models were introduced in the U.S. for the 1974 model year. The top-line GT included a 5-speed manual transmission, rocker panel GT stripes, and styled steel wheels with chrome trim rings. The LT was marketed as an economy model. Mid-1974 saw minor changes in the Celica's trim and badges. The automatic transmission became an option on North American ST and LT models starting in the 1973 model year. For 1975, the '74 body was used, but body-color plastic fascia and sturdier chrome and black rubber bumpers, replaced the chrome bumpers used in the earlier cars (in accordance with US Federal bumper laws).