Originally Posted by 1Bear

If it's truly a 2001 model, it will have the aluminum heads and the short crank, so he should be good to go with whatever transmission he chooses.

Originally Posted by budhayes3

You can make the long crank 99-00 block work with a 60E if you use a custom torque converter BTW

Originally Posted by offroadrider12

Don't the early 6.0s have the longer crank that doesn't work with the 4l60e?

Honestly, if you're aiming for that much HP down the road just get the 80e and be done. Put a shift kit in the 80e and a tune and you've got a very stout setup.

6.0, 4l80e. ebay headers and a tune in a reg cab 1500 will leave you saying wow even without a cam and converter.

Originally Posted by FFDP

If it's a 1500 chassis, it's still a 4L60e. You can compare a picture of a 4L80e to yours if you want but no half ton ever came with a factory installed 4L80e.