MY k10 with 350 tbi 700r4 342s and 33s shutters when in overdrive lock up at interstate speeds, lower speeds it isnt noticeable. It has happened since i bought it so far new dist. cap, rotor, coil, plugs, fuel pump, delco O2. I just changed the fp reg spring to one that had more pressure and turned in a screw for good measure (adapter and gauge in route) anyone care to decipher the log I recorded after reinstalling the new spring?