I bought a 3fe set up from land cruiser parts.net to put in my fj40 but decided to go another route.... I would be willing to sell it if your still interested.... I know I’m late to the post but I was looking up ls swap threads and came across thisI sold my 3FE and now regret it, since I now have a non-running 40 project in the driveway. If the 1F doesn’t have good compression, I may be looking for a motor…
PM me if you decide to sell it
Good luck on your swap!