engine problem

Would like to learn about your experience if you had your LC engine replaced with similar engine from another donor car? I have LC 94 w/HG that's been sitting there for a while and I want to do engine replacement and saw a recked 97 LX with 180K engine for sale. Could this work and what gotchas...

Got back from a 2 month patrol during which I left the cruiser sitting in my squadron's parking lot with the battery disconnected. After reconnecting the battery, i started her up and drove away with no problems. After a few days, I began having a recurring problem. When I shut of the engine...