Technical 9" Ford, Trying to determine axle shaft length application.

I did a search on "axle shaft length" here and struck out all the dissuasion was about housing width.
I'm looking specifically for the axle lengths for a 1957 Ford axle assembly (the ones with no dimples)

I've disassembled quite a few 9" axles and didn't label which are which.
Specifically I'm asking about 1957- 1962 axles for cars 28 spline 4.5 BP.
I measured all of the early axle housings and most are 55" but someone local is wanting a 52-1/2" housing which I have 3 and a still complete 1957 axle.
So getting to the crux of my question. The wheel flanges are 3" (?) out from the housing ends so 6" + 52" is 58/2 or centerline should be 29". Less the approximate 1" between the shaft ends
If I remember correctly the shafts are 3" different in length. Am I looking for 29" and 26" ?
Is there a chart that shows Ford 9" axle shaft lengths vs wheel mounting surfaces? Or how do I calculate them?
Thanks for any insight.
Movin/on

 

30.50" right side
26.06" left side

measured outside face of flange, to end of spline

according to Hollanders

 

Measurements I used when I ordered from Dutchman from their replacement axle list.

26 1/8" 30 5/16"

 

Thanks RmK57 and Squirrel.
I've found a few 26 1/8 shafts but was curious about which longer ones I'd have to match it with.
Now I can match other pairs up and use the difference for the 55" width housings.
Movin/on