How much will a 4" lift *really* lift?

[BobRitts]

Hi Guys...

Considering a 4" lift kit, wondering what the final ride height will be on a 72 K10 LWB Chevy. I see "stock" trucks that vary by 2" - 4" in ride height, so I'm wondering if anyone has any measurements as to the final height *after* a lift.

In other words... does the 4" apply to the original height when new, or to the 34-yr old sagged suspension that most stockers have by now? I'm thinking that there is so much variation in these trucks that what is sold as a 4" lift might give me anywhere from 2 to 6 inches in reality... and I don't want to spend the time and effort to get a too low or too high lift.

Thanks!