I have an 87 non turbo auto. Just dropped a new motor and tranny. The torque converter was just recently replaced. On the freeway it revs to about 3500 goin 80.. Does that sound right? Feels like when I press on the gas it does not want to downshift to accel.. it just gradually gets there... Please help.. I have a funny feeling that the catalytic converter is clogged to shit and that would be the problem..... and that maybe the reason why the 1st motor was blown the first time.. any input would be great!