Regarding the piggy back breakers. It is up to the panel manufacture and normally stated on the panel's instructions. I doubt if older Westinghouse panels had a provision for them.
I stand a little differently from Dan. As an electrician I would be pushing for the upgrade. It might actually be a less expensive install than gas. Plus, big plus you could be making the money.
Not to mention who knows what gas prices will be in the future. At least electric rates are regulated.
Last edited by SmithBuilt; 02-12-11 at 10:27 AM.
Whether you think that you can, or that you can't, you are usually right.