46 chev had only 15 lbs oil pressure and were not built to take inserts. You would have to change much more than the rods for inserts. Example ,,, Crank, oil pump, probably the block.. Nah it just ain't practical. If you want inserts just pick up a late 53 or later engine.. You can tell if they had inserts by the oil pressure gauge. Inserts max 60 lbs babbit max 30 lbs
