Why, either way, you've still got to answer the prime question. What happened to my motor?
You don't give a lot of info in your post, but if your motor blew, then just putting in a new motor from SBT, without knowing why it blew, then you'll likely blow it again, then blame SBT for selling you a faulty engine.
If you got the bucks, know how and time, then building your own motor is more rewarding...... but I've used many, many SBT engines with very little problems; only because I will find the "root cause" of why the first one blew to begin with......:cheers: