& HF has a $9.95 digital scale that is just as accurate as my now deceased buddys high dollar one was. suspending the rod ends horizontle is tricky but search it & the other parts (pistons/pins/rings/locks (if used)? bearings weighing/comparing is easy, weigh em & compare to the old stuff. You can trim the rod big/small ends appropriately as needed. read up on it (youtube/google)