common rail

Hello everyone, I have a bunch of kubota common rail engines ranging from the 1803CR to the V3800CR. I need a way to test run these engines before wasting time putting them into a machine just to find some issue. I understand I would need a custom wiring harness and the ECM, has anyone tried...

I'm looking to buy an older Case Maxxum 125 for an all around ranch tractor. What are the pros and cons of common rail injection vs mechanical? Is there any difference in fuel economy? Long term maintenance? I'd appreciate any input.