<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: BigKev</div><div class="ubbcode-body">Then according to the Packard Engine Serial number reference on the website, it would be this: 1927-4th Series Six (423, 433) Engine Serial Range: 95007 - 120407 288 CID 6 Cyl 81 HP L-Head, Inline, 7 Bearing, Mechanical Lifters </div></div> Close enough but it's a 426 not 423. Friend of mine's car and he's having trouble starting it, he just got it not long ago. The owner's manual that came with it says Packard six but it has the model 526 typed on it and it appears to be the original one. The illustration of the dash in the manual isn't like the one in the pic I posted. So the start-up procedure is confusing.