Anyone know of a reliable place to get a new complete crate 6.6 L duramax. mine has 2 blown head gaskets. unfortunately its cheaper to put in a new engine than to repair the head gaskets.

 

If you can do the work yourself head gaskets aren't that bad to swap. If you're set on a motor I'd pick up a lower mileage used motor. A crate Dmax will run you 15 grand, whereas a used good condition motor will run you a third of that.