I've got a '77 liftback 1st gen Celica (Australian spec), which is pretty similar to your RA21.
http://ourworld.compuserve.com/homepages/stepho/mycar.htm
- 18R-G twincam engine
- twin 45DCOE Webbers
- electronic ignition
- 2.5" exhaust
- thermo fan
- Lowered suspension
- Supra rear end (wider, discs, LSD)
- 85 GT-S seats
- JDM Cressida wooden steering wheel
- '85 15x6" alloy rims
- 205, 225 tyres
- camber adjuster plate
- MX61 Cressida 24mm anti sway bar.
- MX61 Cressida electric windows
- Quartz Halogen headlights
- US '77 GT door mirrors (weren't available on my Australian spec model)
- new rubber seals
- Stepho