The door plate indicates that it was built in February, 1974 so it cannot be a 1970, but probably a 1974. If you can, get a picture of the build plate located in the front compartment, It will give you the "vin" number of the car, probably 74024304R, the engine number and the trans axle number. That will let you check the engine and trans axle to confirm it's a numbers matching car. Based on the info you have so far, my guess is that it is a Twin Cam Special" with a 5 speed trans axle. It will also tell you the original paint color, although my experience is that the color code can be wrong. No explanation, mine says black while the car is brown.
JBCOLLIER and ROSCO5000 have made good points.
Good Luck!