I would flash the newest stock alltel build with new radio in it. Then reflash custom rom of you're choice as for alltel specific roms.
I bounce between 3 chefs that have provided the best out of the box compatibility with my out in the middle of nwww.everythingdiamoowhere reception. Indagroove (grooverom now on
www.everythingdiamond.info), demolition roms, and new chaos theory roms.
If you need any other cabs, etc or just have questions be happy to help just pm me. I am always trolling around somewhere.