1964 long bed 5 lug upgrade ?
 

Put a '71 rear axle housing under my '64 long bed. Question on rear tracking bar arm. The '64 had a bracket welded to axle tube for rod/ sway bar . Is the '71 bar fit on '64 frame mount then to '71 axle ? Correct length ,angle ?

Re: 1964 long bed 5 lug upgrade ?
 

Just try the '71 track bar.
The rearend needs to be centered at ride height.
If not,... there are many companies that sell adjustable versions.

Re: 1964 long bed 5 lug upgrade ?
 

Yes you will want to use the '71 panhard bar, but you will have to make a slight bend in it at the end that bolts to the frame bracket.