Is my drive shaft too short?

I just came up with this before picture taken when I first bought the car. Same shaft, different slip yoke, but I have no reason to believe they were any differences between the two. The one difference is that I changed the leaf springs out with a pair that I bought at a swap meet. They were a new set that the seller bought from Mancini's for his A-body. I'm now thinking that the front segments are not 20" long. Maybe more like 21-22" long?
Here also is a pic of the new leaf springs. I could never find the part number stamped on it listed anywhere.

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