I agree with rusty, I had an 80's super s ix slant 1500, ( last year for the slant, 87 or 88??).... I pulled a 18 ft car trailer, usually with a B body. pulled it fine in these low hills and semi flat ground, ONCE I got it rolling!! I was between cummins, before the cummins I had chevy 3500 454's, great pulling trucks before the cummins but gas hogs needless to say.