zlacker

Effectively the same aside from time if you are waiting on yours to be rebuilt. One is the engine you have that needs to be rebuilt and the other was rebuilt because someone did a swap and now its inventory in a shop that sells refurbished engines.

[Edit] Adding jaclaz's very good point that one might be able to save money rebuilding their own if it requires less parts.

>>LinuxB+(OP)
Some refurbished parts come with a short warranty as well which can help cut risk if the rebuild was done poorly. They come in crates from a factory so the people who did the work specialized and have probably seen all the potential problems.

>>throwa+x1
Agreed that is the direction I would go. The only reason I can think to wait on a rebuild would be if one knows/trusts the mechanic and/or they are having modifications done to the engine for cooling, turbo, fuel efficiency, brackets for different accessories like dual alternators, computer tuning after removing components from the engine, etc...