Hello All. My name is Joe. I'm in the process of rebuilding a 74 Cruiser with the F155 transition 3.9l motor. Part of my rebuild will include rebuilding the original motor. I have a spare F125 motor I got from a friend. I was considering dropping the 125 in so I can have a little fun while I rebuild the 155. I know the 125 was an import from Japan and was possibly in a fire truck. I'm having a hard time getting info or specs for this engine. Any help would be much appreciated. The serial # is F271195. There are quite a few other casting numbers on the block and housings but I won't list all of those unless they are needed. Thanks in advance!