Shock relocation (?) with leaf springs

[barryvanhook]

I have a ’69 “Chevy” truck .. at least that’s what the title says. But I believe the underside is all GMC of that year. The data plate carries a GMC vin and it has rear leaf springs. I'm uncertain of the identity of the rear end; it does have 5-bolt axles. The previous owner lowered the rear using a flip kit. The rear shocks (air) are leaning forward at a 45-degree angle, approximately. The springs each have 4 leafs. I don’t have much rear suspension travel. I know that those of you with rear coils use the shock relocation brackets from CPP or ECE, but they don't apply to rear leaf suspensions. What are my options to regain suspension travel?

Barry