You have to be the judge of your own engine rebuild capability in the end. I can share with you my experience on my KL.
I broke down the engine myself removing all the ancillary items and found a local machine shop with an excellent reputation for engine rebuilds. He agreed to take on the block rebuild with parts from Jim Staib (www.finewoodboats.com
) while I had the ancillary items reworked by the "experts" or locally recommended sources.
To make a long story short in the end everything worked out great but there were some bumps in the road along the way and there are unique things about these engines and transmissions that your local machine shop may not know and could prove to be an issue in the end. I don't know that they are written down anywhere so if you go the local route then at least find someone knowledgeable to keep you honest.