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A few for sale on eWills. One sold but a few left.

http://www.ewillys.com/?s=l134+engine

Don't give up so easy guy's. I see them come up from time to time. All you need is a good used core. You can find rusted up L134's that have been junked. I would exhaust Google and the usual web...

A lot certainly went into it. They have been around since 2016. I haven't heard any bad things. If you go with one, a full instrumentation of the critical dimensions would go a long way to tell you...