no need to change the computer.....and actually working on a newer engine is in many ways easier than the old school carbs and timing....on these engines there are a lot of electrical connectors but no adjustments to timing, fuel, etc. Adjusting the distributor and setting the timing on an older engine is not always easy.
I ordered the engine from an auto salvage company in Dallas, TX. I originally ordered a used 62,000 mile engine but they either didn't actually have it or they said they mis-shipped it and sent me a rebuilt engine.
The used engine was going to cost $1400, the rebuilt was $2500 but they only charged me for the used one.
I will see how it does.....a rebuilt engine is only has good as the person who did the work.
The one thing I have learned that could get you into a real headache is that the liberty engines are not all the same. 2002-2003 engines are not the same as the 2004+ engines. The reluctor wheel on the crankshaft is different and if you use the wrong motor it will not start because the computer uses a crankshaft position sensor to set the timing. I was really worried for a while that the salvage yard sent me a newer motor...but it was the right one.