Good questions guys. So, most 71 are U150. With the exception of the Seattle DSO Bajas which are U152 in '71. I think this is because the 71 Baja was spec'd out to have HD springs 850/1280. I think because the Baja Bronco mandatory factory equipment list had those springs listed separately, they added them to the option list - instead of getting them as part of the U152 package. I think it is simple as someone at Ford or Stroppe not knowing they could simply select U152 package. And for ease of production didn't change til next year.
The Seattle DSO Bajas are a fun bunch and Marti can't see them. I've spoken to him and emailed about them with him as far back as late 90s or early 2000 whenever Marti started doing non Mustangs. It also took me clueing them in about something - I ordered 3 or 4 Deluxe reports and they showed up correct, but just special paint, special order Broncos. I sent all four to him together and told him I was registrar of Baja Broncos and that these 4 were Bajas. He extrapolated something, that helped him identify them, at least 3 of them and reprinted all them (back when they printed and sent to you), except for my daily Driver Seattle DSO baja, which he said he still can't see. Now when you get a Marti Deluxe report it says "Converted by Stroppe with the Baja Bronco Package" due to that exchange.
So far no 4.11LS have been found on Seattle DSO Bajas, only 3.50. And no U150.
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