STP oil treatment (Stay Together Please) is still out there !!

Those were the days-weren't they?
I bought an72 Cutlass for
$50 from a friend after he came home drunk one night. Had the sense to open the garage door to pull it in he just don’t have the sense to stop once he got in. First thing I did was change the oil and when I fired it up it had a rod knock. Jeff said oh yea just add a couple cans of Stp to it. It will quite down. It did and I beat the hell out of that 350 until one night driving down the highway my friends girlfriend fell off his lap and dropped it into first. It really started knocking then. Drove them home and went home myself. Dropped the pan the next day and it had spun 7 rod bearings. It got a 455 in it two days later.