sorry if i'm a little slow...an 84 olds 3.8... are you sure it's carbed? by that time olds had q-jets and maybe dual-jets on 307's, they kept those until 90 when they stopped production. i cant imagine an olds with a 3.8 carb.
anynway, i would use a K hanger and ch or cp rods(try ch first). this is usually an ecomony combo and is used on v-8's. in your case it will probably run nice, maybe a little rich. throw in the cp's and see what happens.
second, make these two adjustments...
bend the vacuume tang that pulls the secondary air door closed on the right side of the carb so that when the car is idling the air doors are pulled just a C-hair short of fully closed. if you open it more, the carb will bog. second find the adjustment for the air door spring tension under that tang. there is a micro flathead screw. directly underneath the screw there is a allen screw acting as a stake for the flathead. loosen the allen a bit then tighten the flat screw a bit, 1/4 turn-1/2 turn. this will increase the vcacuume needed to open the doors, which sounds like a bad thing, but on your engine should increase the crispness of the secondaries and open them only when the engine needs them. if the car can take the carb fine, the reverse the change.