cylinder head ID

[Packard8]

Hi folks,

I'm trying to ID a straight 8 head that I don't find in the parts book. P/N is 455139 and casting date is 12-15-53. There is no "288", "327" "AT" or "STD" marking on the head, just "PACKARD THUNDERBOLT", the P/N & date.

TIA

[Guest Randy Berger]

Look in the 48-54 parts book under 455140 as the casting number is frequently one number earlier than the part number. Look under group 5.0503. It appears to be an export head.

[Packard8]

<div class="ubbcode-block"><div class="ubbcode-header">Quote:</div><div class="ubbcode-body">Look in the 48-54 parts book under 455140 as the casting number is frequently one number earlier than the part number. Look under group 5.0503. It appears to be an export head. </div></div>

Thanks Randy, I did see the P/N 455140 and see it is rated @ 8.0:1 CR on a 327 and and 7.2 on a 288. I wasn't aware that the published number would be one digit later than the one on the casting.

I am going to cc it as I need to order custom pistons anyway. It also seems to have the extra "dimple" in the top of the chamber as some of the late straight 8's did.

THX,

John