I have been looking into sending out one of my motors for modification. I want to have the cases matched, crank trued, head done (possibly bigger valves), etc. But I have only found a couple of places. I was wondering if anyone has had a good experience with anyone. Also I am looking for other internal engine parts to look into. I am also looking for a Big Bore Kit (475cc - 500cc). But that is not as high on my list of things to do. I want to be able to have a Big Bore cylinder and a Standard cylinder. Any help would be great.