66 Valiant questions

I have a 22" in my 66 but it has a HP273. My 70 came with a 19" and it had a 318. That didn't make much sense. My 70 also has dealer installed Chrysler Airtemp A/C but the kit doesn't include a bigger radiator. :BangHead: :BangHead: That I didn't get that either.
some of the **** they did back then didnt make any sense. Matter of fact some of the sit they do today dont make any sense either.