Hello, I have been driving a 911S for some time, but Bj.’77 wants to switch mainly from optical foundation to an urelfer. the further development of 70-73 seems enormous to me and so I am a bit perplexed if I drive the total catastrophe directly in the choice of the wrong building year. I love to have a 71er 911T. however, this has the 2.2 liter carburetor engine with relatively little power in it. in the reason the performance is not important to me, however I would like to hl the construction years the most problem-free (relative) motor drive. what is your tip? best the latest 73er urelfer model with electronic injection? thank you for your help seben