Dpage, what ever else you choose to do to that olds, Throw the blued rods in the trash!!!and try to find a good Hardin Marine crank, I know some, if not all of them, were crossdrilled. This is just one of the things you need to do to make the olds live. You might also consider pinning the lower rod bearings, and use aftermarket rod bolts. After all is said and done, remember, olds motors aren't chevys, they don't like major rpms, but they will make some awesome power if treated right!!....my .02 ....Moneypitt