70’ Duster 340 4 speed value

At my advanced age and since I did not retire wealthy! I enjoy playing with cars that are as affordable as possible. Especially since I have always had to have a few projects on hand. So I am drawn toward cars I can just enjoy and not feel guilty because I have more $ invested in it than I feel is fair to my wife. Therefore my feelings toward discussions as to which is worth more? 68 383 cuda or 72 340 duster??? More power to the guy that has a nice one they want to sell.