Can northstar engines in the 90s Eldorado be easily swapped out for an LS engine? Would it require changing the transmission and wiring/computers? Basically are they similar enough or too different? EDIT: the only engine swaps I've helped with in the past were same to same. *sort of*. Took 2.2L out of Dodge Omni and replaced a dead one then eventually swapped it into a Dodge Charger.