Tank Swap:17->20 gal. How many gallons does yours hold?

[IdRatherPushMyFord]

Hey guys. I just found out there was a 20 gallon tank available in 90-94 ranger and 95-97 Mazda Bs. I'd like to get the bigger tank in mine. I was wondering if anyone has done this, and if I'd have to change much to do it?? I can get the tank locally for cheap I'm pretty sure. Thanks