Cummins conversions
We have put 3. 9 Cummins in 3010's and 3020's. The 3. 9BT could be set up to put out more hp. than the stock 4020 without any problems, and make the 3020 into a nice tractor. Installing 5. 9's into IH, White, and Oliver tractors is not at all difficult, we've done those as well, and have put 8. 3's into Case 2470 (older 4 wheel drive). I also know of 3. 9's being put in 870 Case, D17 Allis, and a 460 Farmall. We are currently doing the conversion to put a 3. 9 into a Case endloader - originally the same engine as the 870 Case, except for the addition of a turbo.
Ray