I have had a 1963 +4-4Str for 24 years. It is the Morgan I have driven 3 times across the U.S. and shipped to LeMans for the 50th. The Morgan I would have liked to source was a 4/4-4Str. The Kent engine is much lighter than a TR lump and More reliable. At the time I could not find one. There are a few in the Pacific Northwest. I would keep it stock but have it meticulously balanced.