1968
383
426
1969
383
440-6
426
1970
383
440-4 Superbird only
440-6
426
1971
383
340
440-6
426
1972
400
340
440-4
440-6 (first few weeks)
From 1972-74, if you wanted a 440 in a Road Runner, it was part of the GTX package.
Also, to quote:
<div class="ubbcode-block"><div class="ubbcode-header">Quote:</div><div class="ubbcode-body">According to a little research I did,</div></div>
Which site did you use? Because it's WAY wrong.