1973 Kenworth K123 3406A 400 Caterpillar 4x4 air operated Spicer that works really well it doesnt get hung up an is smooth. Hendrickson spring suspension. This truck is the real deal no bs about this old girl here. Original owner ran the truck until early 2000"s and meticulously cared for this truck. It originally came with an NTC350 and was repowered by the 3406A original owner always said it was a 380hp it runs and sounds very good 60lbs oil psi @ cold idle 40psi @warm idle. He ran right with the E models pulling steel beams up north in the hills, The interior is amazing in this thing the sleeper and cab panels are not all cracked up they"re straight and clean, Its as old school as old school can get... CB radios, FM boosters, 8 track tape player, anti glares in the corners of the windshield that still work. .old atlas"s in the glove box, records that he kept on index cards. air shutters in the front that work. Passenger side front of cab is dented which came from hitting a horse. It is an old truck so heres where I"m at with it now I haven"t got the side windows to work yet, blew the hose to jack the cab up. other than that this truck sure is a classic Feel free to contact me with any questions you may have. Thank You,