Quote:

damper was different on 72 up....lighter low compression pistons...damper looks like early damper ....I have two original complete 73 hp 440 =forged crank , big rod ,low comp. pistons ,standard damper .. from 73 Road Runner and 73 Charger



Good info. I've been spending my time researching 6-Packs only, sorry for the error.
So then it would seem that;

- '69 1/2 440-6 = LY rods, internally balanced

- '70-'71 440-6's AND HP 440's = 6 pack rods and externally balanced

- '72-'75 440 HP = 6 pack rods, internally balanced.

Dave

1970 Super Bee 440 Six Pack 1974 'Cuda 2008 Ram 3500 Diesel 2006 Ram 3500 Diesel 2004.5 Ram 2500 Diesel 2003 Ram 3500 Diesel 2006 Durango Limited [url] http://1970superbee.piczo.com [/url]