My first thing I would say is if you like the engine, then purchase a brand new Hyper engine with less hassle of a rebuild but in this case we no longer have the complete engine in stock, however we have all the rebuild parts for the engine to bring it back to life. The piston/sleeve/rod combo is already set and no need to hassle with wrist pin and the clips on part number 53027, you also need the front and rear bearings for a solid rebuild. The other thing to check is the journal on the crankshaft, from looking at the pics of the sand I can't really say how long the sand was running in the engine but if it was a long period then that needs change also, it's a pretty penny to rebuild but if the engine has been a good runner then go for it.