No, you can't just bolt it on. You need a new twin-path harmonic balancer, engine accessory brackets, wiring harness, PCM, transmission, and some internal engine parts. Even the pistons, rods, and Camshaft are different.
The Series 1 L67 is a much different beast than the L27 in your car.
The most cost-effective method is to sell your SSE and buy an SSEi outright.
Next would be a full drivetrain swap including wiring harness, PCM, engine, and trans.
Last would be what you propose.
Excerpts from a Bonneville sales brochure:
L27 (your engine):
Specific high-flow injectors
electronic bypass valve
special duty connecting reods
high-silicone alloy pistons
floating wrist pins
forged steel cam
And that doesn't even BEGIN to touch on all the other differences like transaxle, gear ratio, engine mounts, etc.