I've read a few places now that say that the ethanol gas will eat at the brass floats. I found this plastic one that looks like it could work but I haven't been able to find the exact dimensions for it. It's a jeep part and I know people have used them in ford pickups, Scouts and trifive chevys. Think I'll order one and see if it fits.
Amazon.com: Omix-Ada 17729.01 Fuel Tank Plastic Float: Automotive