Hello board! So I have finally got motivated to get my '72 CB500 up and running and my first order of business is getting a fuel tank. I found one on eBay for cheap that is for a '76 CB550, but will this fit my '72 CB500? Both tanks have a 3.7 gallon capacity...and they look similar, but I don't want to get a tank that I can't use. ANy input would be greatly appreciated! Thanks a million, Kyle