Child& Alberts

they do grow a long way but the big issue here is that the big end grows and the bear gets loose and cant get the heat out of it and if the oil get really hot may loose enough that they move around get oil on the back side.
i know people that have run them on the street but the set up the rod for max bearing crush and never ran the engine for a extended period of time. so you better find someone that has a lot of experience with them to give you pointers