I need some opinions from some of the more seasoned engine guys out there: I am no where near ready to pull the trigger on a new drivetrain yet, but someday. Origionaly I wanted a cummins 6bt/4bt to put in the truck (@America.Mike is my hero), just to avoid all the computers and sensors and chit that scares me. But I've been looking for a while now, and even the high mileage pullout motors are going for $3k+. That's before rebuild. So probably 5-8K into the motor before it would be ready to run. That's a pretty hard pill to swallow when I've seen some crate motors (turn key) for the same price. Building my own motor is an option, Ive just never done it before. So, just want to get y'alls opinion on crate motors. I don't need a 1200hp fire breathing dragon, but enough low end torque to give my 40's something to whine about. Seems like the 383 is the way to go to build low end torque. I'd like to be in the 350-400hp ball park. The less complicated the swap, the better... Input? options? companies you have used/would recommend? EFI fuel system recommendations?