Need set-up reccomendations

[wcn8tive]

OK this is the set up I am going with 80's Iroc-Z wheels (15s) with yokohama 245/60/15s all season performance. Wanting to lower car a little maybe about an inch no more than 2, so I need help finding the best set up to go with.. ideas springs with adjustable shocks, or performance lowering spring with non-adjustable shock.... let me know, I dont race, but would overall like a very stable suspension.. oh yeah I dont own a GN or T-type, just a 3.8 V6 RWD. Going to uprgade for extra HP, so need better suspension.. let me know what would be best....