Nice 40!! Depending on what you are looking to do, stock restoration or dd / trail rig, let this point you the direction with the drive train. Stock restoration is going to increase the resale value considerably but if you are looking to build the dd / trail rig then the sky is the limit on choices. Let you desire and wallet be determining factor.. If you do decide to go with the 3FE, I have one you can go through, it has about 200K on it and is a long block, compression is fair and you can have it cheep.. $400.00 no harness though. Good luck with you new project, great find!!!