A Simple Question About Replacing Original Fuel Tank

[DT1]

Hi folks. It's been a while since I've participated in the forum. I'd like a little advice on replacing the original fuel tank on my 72 C10. It seems that the old tank is coughing up rust to the point of unseating the carburetor float valve, so I ordered a new one. My question is; should remove the rubber boot on the filler neck before I remove the tank or should I try to just pull the old tank through the boot. I'm sure I can try to figure a way to do it but I'd like to get advice from someone here that has done it before. Thanks!