Pinto Car Club of America

i have a 1976 ford pinto hatchback thats been in my driveway for three years and its time to fix er up.
can anyone lead me to the path that will  tell me what i have ie: motor type,trans,rearend,etc,
i want to customize this car with the original motor, thier is a small emblem on the fenders that say  (MPG) does this mean anything
any help on these topics would be awesome     lorn green