Carl - the gas is bubbling out because the castings are warped. If you do a search, you will probably find at least a couple of threads on straightening the castings using pressure, heat, and lots of patience; only to have the joy of doing it again in 3~5 years, and every 3~5 years after that. Jon G. and I have discussed it.
Truckernix - who do you think you might call to get a rebuilding kit with a leather accelerator pump?
Jon.