1973 duster front suspension upgrade

i have 920 vars in my slant6 duster, they are ok, id kind of like stiffer. i am running kyb shoocks, when i tear it down im putting on adjustable tube uppers and hiem jointed strut rods. in the rear i put 6 leaf springs nylon front eye bushings and prothane hd shackles. i need to get a firm feel box and some sway bars. im running 245 40 17s on all 4 corners. those few changes make it handle real nice and not a harsh ride at all.