71 Blazer inner & outer axel spline/length/replacement?

[michael.howell12]

I have a 71 blazer and the ujoint holes on the front axels are shot. The holes that hold the ujoint in place are broken due to abuse. I bought it like this. Does anyone know what spline/length/size axel is a direct replacement? I was looking online and it seems like I could buy the wrong one pretty easily.

Didn't want to take it all apart just to measure the axel since it's my daily driver. Not sure if I can keep riding around if I can't get the axel back together being broke like that!

Will be the first time swapping axels out.