yah pretty easy swap if u have both cars still, u are gonna have to swap over the ecu and wiring harness from the si cuz itll have mpfi, instead of dpfi, unless u want to make the adjustment for the extra injectors and add a few wires and adjust it to the ecu urself, id say swap over everything, ecu wiring harness, motor and tranny as well as axles and nuckles and hubs if u see the si are beefier. should be able to use the same mounts so no problem there direct bolt over.