You never know with Eagles people wack on the serial number titles get lost and people just use any Eagle title and change the serial number to match the title,if your has the original speedometer which is doubtful the serial number will be on the back of it or under the body trim below the windows,and. it will have a frame number if the section wasn't rusted out and replaced you can match the frame number to get the serial number fwiw ,Brownsville built Eagles should have 5 numbers on a 05 they added a 1 in front of the 4 numbers for plant ID just in case anyone is looking at Eagles it get confusing when the same bus has the 5 number serial number made a few weeks apart in different countries