The engine and trans your looking at will have a different transmission, so you will have problems with the PCM, and swapping the PCM I don't believe will help because wires are missing. The new transmission is a electronically controlled, the one in your car is a 4t60 and is vacuum controlled. As for the engine I think there are some differences in mounts, but I'm not sure. But you can take any parts off your old engine and swap them over. When you pull the engine, just look it over and inspect any differences, mounts, sensors, etc. And transfer it over. But the transmission will be a problem.
SAVING THE WORLD ONE BONNEVILLE AT A TIME
1997,1998,2000,2005 year confused Bonneville SSExi. Stock? ish.
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