Header Clearence

[bucky_21_7]

I'm looking at buying headers for my small block i'm building. I need to know when header companyes say there made for stock ride hights wil those headers work for my truck liek ground clearence wise. My trucks a 72 c10 with aproximitly 3 inches of lowering all the way around. I can't mesure my truck's ride hight because theres no motor in it. Also my glove box door said i have heavy duty front springs and leafs in the back. The leafs are stil there but i don't know if my front coils are still the heavy duty ones because i didn't lower my truck, i bought it like that. Any way of knowing if those are the heavy duty springs. Just leting you know cause if the heavy duty coils are still there i would think they would move less cause there heavy duty compared to the reguler ones. Thanks