Hi, I'm looking for ideas on how to remove rear brake drums on a 1970 gmc 3/4 ton pickup. I've sprayed them, pounded on them, not sure what to do next. Is there a wheel or gear puller big enough to fit over this drum? I don't know if this is good or bad but the bolts on the back side of the hub (where e-brake and wheel cylinder bolt on) are welded on. Thanks for reading. John