S13 drive shaft VS S14 drive shaft.

Ok guys. I dont have the 2 laying around for comparison…

soo if you know facts… I need to know how much shorter a S13 drive shaft is then a S14?

the reason I ask is I got my RB swap comming and it has a S13 drive shaft Not the S14 one I need. I am Just curious How much shorter it is… and if I need to find a drive shaft shop…

also anyone know any good drive shaft shops that can modify my Mkenney drive shaft?