Technical I Beam Axle Widths

Is there a chart available of the different Early Ford axle widths here? I'm having a problem mounting my front axle to the used front spring I picked up, any help will be much appreciated. Thanks

 

Speedway motors has a chart listing axle width and spring mounting width.

 

The '46-'48 are wider

 

Sid's axles website has been helpful for me.

https://www.google.com/url?sa=t&sou...FjAAegQIBhAD&usg=AOvVaw3MDMme1iwhqHsmOe8RR6tK

 

This might help you.....

 

My axle measures center to center at king pins 49", the spring perches measure center to center 37". the king pins are 13/16". The shackles I'm using are the Model A type, now the question is which front spring would work running a 276 Desoto hemi?