Hi, keep in mind that coils with a higher spring rate may increase ride harshness, maybe look into airlift coil boosters (airbags that fit inside the coils). I have not tried these yet but have heard some good things about the results and am planning to try them when my finances permit, like you I am not a fan of the raked butt high nose low look on a pickup, maybe a '70's muscle car but not on a pickup.
All the best,
Tracey>>>>>>>>>>>>>>>>>>>>>>>>>>>