1986 k5 blazer front axle inner axles

[78k10bro]

I picked up a 1986 k5 blazer and I’m wanting to build the front axle cause not all of us have the d60 money. I am wondering if there’s anyway to tell if I have 28 or 30 spline axles without tearing it apart. Been searching and I’ve found mixed results of the later axles being 30 spline but don’t know if 86 qualifies for that. Thanks

 

[MarineOne]

Should be 28 spline 88 was the switch