Six Pack Balancer

[lilwendal]

I was wondering if anyone has a good pick and or part number for the correct 6 pack balancer for the heavy rods.
I'm trying to make sure I dont end uo getting a cast dampner since I believe they both have that eliptic shape on the front  Thanks

[hemi68charger]

I was wondering if anyone has a good pick and or part number for the correct 6 pack balancer for the heavy rods.
I'm trying to make sure I dont end uo getting a cast dampner since I believe they both have that eliptic shape on the front  Thanks

The '70/'71 HP 440 dampner will have a unique design... The '69 and earlier don't have the counter-eccentric weight on it.. The later models have the much thicker dampner for the cast crank........  Someone should post a picture if I can't get to mind later on this week..........

Troy

[firefighter3931]

Here's a pic and description of the steel crank/6-pack rod harmonic balancer from the 440source website :

"Shown above is damper #3512017, commonly known as a "six-pack" damper. This damper can be easily identified by a small .210" thousandths thick elliptical weight attached to the center hub. This version was used in '70 and '71 and has the offset pulley bolt pattern. Be careful not to confuse it with 3614372, which was used only in '72 and looks similar except for having a symmetrical pulley bolt pattern. The weight on the 3614372 may be slightly thicker at .255", but we have not been able to verify this.
Even though these dampers have an elliptical weight, they were never used with any cast cranks. These dampers were used with steel cranks and "six pack" (2951908 casting #) rods. The extra weight is to offset the added weight of the extra metal in the rods and pistons. Another important fact is that even though six pack rods continued to be used up until 1975 in HP and truck 440's with steel cranks, they did NOT use this damper. As you can see from the chart above, any 73-75 steel crank 440 (with either six pack or standard rods) would have come with the 3614371 damper. We have found this to be absolutely true."


Ron