Best shock length for 4” lift

[tommartin]

So my truck has about a 4” lift on it, I’m in need of some shocks.

I went up 1” up front, and the shocks are too short, which also tells me they were too short to begin with.

It has some ok flex up front, no anti sway right now or overload. I put an extra rear leaf from a 99 Suburban to help out some sag it had.

Just wondering what shock length to go for. I was planning on using the stock mounts too.

Thanks