Working on the bike of a friend of my son's. Twenty year old Savoy...whatever that is. Made in Taiwan, flatbar 18 speed Shimano SIS. Showing him how to clean and repack the bearings (all in good shape)....and then I got to the crankset, an Ashtabula TRIPLE, riveted together. IT had a bad case of chain suck...as in the chain got sucked in between the middle and big ring....apparently repeatedly. I tried some "adjusting" with a large pair of vice-grips, squeezing and twisting the ring back to where it should be. Got it kind of working....NEVER seen an Ashtabula triple....probably for good reason. NOT a good idea. Short of the dumpster, any good ways to fix? It is Not worth a conversion kit and decent crankset.