64 rear end swap

[chris91]

I am ready to do my rear end swap, could someone tell me the length of the panhard bar so I can order before i start. Thank You.

[SCOTI]

Originally Posted by chris91

I am ready to do my rear end swap, could someone tell me the length of the panhard bar so I can order before i start. Thank You.

It depends. These trucks are old enough that it's common for earlier models to have later model rears installed. Different years came w/slightly different Panhard bar mounting locations.

What exactly are you swapping the rear from/to?

[chris91]

I thought there was an adjustable panhard bar that everyone was using. I just want to get all the parts before I start. I a using the 71 chevy rearend.

[SCOTI]

Originally Posted by chris91

I thought there was an adjustable panhard bar that everyone was using. I just want to get all the parts before I start. I a using the 71 chevy rearend.

The PHB's (Panhard bars) come in two common lengths: 24" & 34". The shorter one mounts from the factory stud (@ the upper right side of the differential on 67-72's) to the factory frame mount on the bottom of the drivers framerail. The longer one is mounted on aftermarket brackets that sandwich the pass truck arm & cross over to the factory frame mount on the bottom of the drivers framerail.

Which length bar is determined by which mounting location you intend to use. The longer the bar, the less side-to-side movement the rear housing will see during the full range of suspension travel.

[Captainfab]

Your '64 would have originally had the longer panhard bar that went from the drivers side frame to the bracket welded to the passenger side axle tube. Since you're switching to a '71 rear end, that is designed to use the shorter panhard bar. The issue I have found with converting to the short panhard bar is that the bracket on the frame isn't at quite the proper angle for the short bar. This can be fixed by removing the rivets on the bracket, elongating the holes slightly, and reattaching to the frame with bolts.

As for which adjustable panhard bar, get the shorter of the two unless you are going to lower the rear suspension.

[chris91]

I do not plan on lowering. Thank you.

[chris91]

If I were to get the factory bar off of a 69-72 truck would it be the right length?

[SCOTI]

The 64 & 67-72 driver side frame mounts are slightly different. A standard poly style bushing that comes w/most aftermarket Panhard bars will not want to work (it will bind). As mentioned above, you can prob tweak the frame mount to work & use the correct bar for a 71-72.