Big block a body....To med a sleeper has to be 'all in', quiet mufflers, unassumeing colors, stealth dual exhaust (my duster had a Dummy 318 single 2" tailpipe while the dual 2 1/2"s dumped out just behind the rear wheels completely hidden from view.

Second choice won't be popular but it is a Mopar...1990-94 Eagle Talon AWD, evo 16G turbo and some tuning tricks will put out 24+psi and will nail a 1.6 60' and run high 11's on street tires.

I used to think 67-69 Post A bodies were sleepers but if anything they are so obviously NOT sleepers.....much like the 327/375 Chevy II's anyone encountering one is once bitten-twice shy.

Still gotta Say Larry's pristine white Dart with the 414" cross ram is the car I wish I had as a Stablemate to my big blue Dodge.