if I took it apart I would change out the rods and crank key,BUT it runs so perfectly now I hate to fix it ,IF IT AINT BROKE,I could just leave the boost low while I build a replacement,I have a nice standard bore 4 bolt 454,a454 steel crank,a bunch of 7/16 chevy rods,also have a 427 tall deck motor,steel crank,standard bore,I am trying to decide what size the replacement motor should be,I also have a nice set of 990 heads that will go on this next motor,I'm thinking 496 or 525 with 8# boost ,pump gas