I think pretty much the only things on the original 110 motor that's actually high performance are the heads. I believe the 120R has the SE racing parts already there. I'm certain Harley will sell whatever you want to buy if you want to build one from scratch. I would ask why you would not just upgrade the one you have, keeping the same VIN's matching or buy the 120R as opposed to building one entirely from scratch? I don't know about having the motor blueprinted. The SE 4 5/8" crank is a much better crank. I was told by my builder that balancing was not necessary, just have it trued in a jig and welded so that's the route we went..
I was just thinking about not messing with warranty issues on the stock 110 which is kinda dumb considering I'm sure the rest of the drive train warranty would be gone once they figured there was motor work done. I'm just arm chair racing and dreaming again and I've been thinking about going to a 124". The SE crank/rods would work for that (I think) but I'd need to replace the cylinders/pistons which would be a waste if ordering up a 120R. 6's I guess.
I'm sure they blueprinted your engine as they built your engine. It's just another word for attention to detail like checking & matching combustion chamber cc's and making sure they're equal, sharp edges deburred etc. And yes the SE crank does look much better. Having someone build me an engine via UPS doesn't address dyno tuning efforts and since I don't know who has one out in my area, I'll have to find out first. High Desert H-D in Boise has one I think but I don't really want to do business with them again.
There is a High Desert Cycle in Idaho Falls and I understand he has one but want to make sure that people reading this understand that I'm not bad mouthing the one in Idaho Falls. Sounds promising so I'll check out his business.
Cheers!