I clicked "here" ... nice project that is looking like it is really coming along.
I'll take a stab at answering the 1303 v. 1302 question. First, the one pic shows little of the front windscreen but it definitely looks curved to me -- making it a 1303.
I noticed when I was searching for a car to buy that European cars are often referred to by their birthdate rather than their model year. Hence, a 1973 model -- a 1303 -- may have been manufactured in September, October, November or December of 1972.