1966 Big car rear sway bar
 

Bought an 66 Pontiac Star Chief Coupé.. car has mount a big rear sway bar but it wasn’t correct screwed to the lower rear control arms ..
How will it mount correct ? Seems to be a 70’s seat bar …
Thx ✌️

Check the photos on the Nitemare website. Not exactly the same as your bar but it mounts the same.

https://www.pbase.com/pontiac_perfor...tisway_bar_kit

That would be the proper way to mount it. I’m sure you could fab the required pieces. Hope that helps.

Rear sway bar
 

The bracket slides into the lower rear control arms,.
You will need to test fit it and drill the bolt holes in your lower control arms to bolt them up.
These came on early 70's Grandvilles.
They really perform great,
I have used them in my past 2 66 full sized Pontiacs.
Combined with a 1 1/4" front sway bar, they greatly improve the handling and cornering on these big old cars.
You will definitely notice a huge difference in the ride.

Rear sway bar big cars
 

Thx for that ..yes I double checked the kind of mounting .. I will sandblast the parts and check for installing .. a rear sway bar is definitive a great performance ..done it to my 77 Firebird Esprit ..awesome change and new red adjustable Koni shocks

Just remember if you add a large rear sway bar without improving the front bar you may create an OVER steer condition. Not good.

Those 70s Pontiac B Body bars work fine on the 65-8 cars, but they do mount a bit more forward than the ideal location. My car is in the shop getting new rear control arms. The shop thinks they can source an aftermarket rear sway bar. Hilarious. No one makes one. PMT Fab makes a 61-4 but nothing newer. Frankly, my car turns pretty flat between the big Addco bar in front and the one I have in the back. Not sure about traction tho.