I’ve sent 7 engines I think to Kenny.
Awesome experiences each time.
Metals change, older metals prior to 96 productions I feel were better than what Lycoming produced later on.
Overhauling everything you can VS factory new parts is a way to keep the reliability.
I really like the Alodined on all of the aluminum parts with the black barrels. This basically eliminates the flaking paint from lycoming issues. I painted my barrels, pushrods housings and Valve covers. Everything else is a goldish alodined. Great time to remove the engine mount and re-finish it too.
I would do the DCL on any component offered. Amazing technology.
As far as the oring on the case, I think it’s a great idea, but time will tell if the silk and Permatex vs the o-ring is better.
I would race balance all rotating components along with porting and polishing. The cylinders will be better than Book values by far this way.
Your wait time really depends on how many new parts you actually need. He can do most work in house, vs sending everything to Oklahoma. I would expect a new cam shaft, Rods, rod bolts, a rotating gear or two, Exhaust valves, new hoses and mags. But keep the bendix mags if you have them and overhaul them.
Send it and let them work their magic!
-Matt