Width between stock rear frame rails? 65 Dart

I would go out and measure, but laid up, back surgery. Anybody know what the width is between the rear frame rails on my 65 Dart? It is getting a Mustang EFI gas tank! The tank body is 29.5 long, 24 wide. I want to mount it with the long width spanning the rails, if possible.

I ain't gotta a direct ans for you but you might Google/ebay & see if there is a listed dimention for the A body tank. EDIT & if no luck I bet the FABO guys would know.

Itried all kinds of search words, no luck . If nobody answers hear, then FABO should be able to help.