Great job!
I'm about 7 to 10 days behind you as I am still waiting for the prop to come back. It needed a couple of parts that took a while to get.
What where your instructions for break in?
Happy flying!

The factory re-man's (like yours) are already run in the test cell for an hour at least. This is really a great advantage. Mine came out of the gate with all vitals stable on the maiden test flight.

I like to keep a close eye on CHT's (JPI 6 point) and put some cruise time for the first 5 or so hours. Nice 1 to 1.5 hour legs while varying RPM's every 30 minutes. Keep the CHT's hot but not close to red line. 325 to 350 max and at cruise 300 to 325.

Attached is a nice write up that a good friend did. He has an late model G riley conv

Thanks Herb - will send to my mechanic and see what he thinks. It seems like there are a few different recommendations out there eg. Continental suggests varying the power between 65 - 75 % every 15-30 mins, only in the second hour. I have attached one of the documents they sent.

Also attached an image of the engine hung on the mount. I asked again re the NDT on the mount - answer was: dye for the welds, x-ray for everything else, and ultrasound if there is surface corrosion to see how deep the corrosion is. If it is less than 10 % - no problem - it just gets resurfaced-mine had a small patch of it, luckily < 10%, so that it what they did, then powder coated the mount.

Also had the rear prop O/H'd as was getting the engine replaced - I didn't realized but it makes total sense that they performed NDT on the prop also.

Fresh prop installed - should be ready for ground runs tomorrow.

Looks good James, best to the test runs

Making adjustments still.
Some more photos below - beauty is in the eye of the 337 owner...

Exciting stuff Jim