Scrap yards, old farm trucks like the old grain rigs and some old cement trucks---look for the old aux boxes Dana, Fuller, or Spicer---you can find them with 14% 17% even 26% over drive, and not only that but also with direct drive, under drive and a nutral I believe---Soooo when your running down the road with it in overdrive and you get somewhere you want or may have to use your front end you simply put your aux box in direct drive and your back to where all the original stuff is, and you can use your front end, regular low range, or anything else, these boxes are added on and don't replace your exesting transfer, then when your ready to hit the road unlock the front end put your aux box back in overdrive and get down the road---some of these boxes can be found pretty cheap and if you can weld and do or get just a little driveshaft work done your way ahead of the price deal, then theres the tranny out of the M-54 Mack I think its a 6453--its around a 25% overdrive from the stock multifuel tranny, I have never seen one put in a deuce but it should bolt up but the tranny tunnel may need some work, but if you have a 5 ton multifuel get yerself that M-54 Mack tranny--------------------Driver