I had this discussion with GRP a few years ago when building a all motor all out big block. Piston weight, rod length, RPM and the service intervals lead me to go with a SBC rod bearing instead of the Honda. With a rod over 6.200/7500 rpm they said you would be pulling the pan for bearing inspections due to the lack of bearing surface. I had a 7.250 rod 4.530 bore and 8500 RPM the SBC journals worked fine