I have seen a couple of the 5.7s and 6.1s modded from a friend. They take mods very well. The problems lie in the tunning abilites, which are limited, and the cars they are in. They would be nice in a light weight car as a swap. You can get the 5.7 for a good price at a couple places. Just cause it says HEMI though the price goes up compared to the ls1.