I had an 81A rebuilt at Flathead City about 4 years ago. I delivered the block and parts in person and was given a tour of their shop. There were three "silver haired" guys including Gary working that day and there were a lot of engine projects in various states throughout the shop. Everything looked organized, clean and professional. They had some high end "hot rod" flatheads as well as stock builds in process. He said there were about 30 engines ahead of mine, but because I had 95% of my parts they should be able to get it squeezed in sooner. Mine was completed in 3-4 weeks I think. Ilive about 3 hours drive from Grants Pass.
https://www.youtube.com/watch?v=NP1kLcFHvTw&t=4s