Got this engine sitting on a 72 lazer with around 2700hrs . Would like to have it over-hauled . A mechanic said they had problems with the crank wearing out and replacements were near impossible to find .This engine doesn't leak oil or burn it, but 2700 hrs is alot. is it an easy rebuild ? For pistonslapper. anyone in Tampa you'd recommend to do this .. Please don't tell me Als lawn care products.