Well, after hearing a brand new (and alarming) knock coming from the 340, it was pulled Monday and discovered to have the camshaft bearings coming apart. Without going into the whole story, I had a garage rebuild it for me several years ago and it appears that their skills were lacking.
We're going with a new stroker kit to really strengthen it and get more ponies out of it.
I'll keep you posted as it progresses. Wish me luck.
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