When the first MPC F-3s came out everyone was so excited to get a new f-3 and cheap.
There were tons of old/new parts available at that time. Many of us added port holes and other detail. There were no horns in the first of these diesels. The big letdown was all of those F units only had one motor. They worn't the best of pullers but thank goodness for fast angle wheels. Good luck trying to pull an older Lionel set of passenger cars. Don