<p>Regarding the Dart, after your interesting comments, a little online research, and personal memory jogging, I realize that the "270" emblem on the hood represented the trim package (better than the base 170 but not as cool as the premium GT) and, of course, not the engine displacement. I'm pretty sure our car had the 225 cubic inch slant six, which Wikipedia says was a $50 option over the base 170 cid engine.</p><div></div>