Hope everyone is safe and well!

Can anyone confirm the span between driver and passenger side rear lower control arm sway bar bolt holes on a 1966 442? Currently has stock boxed lower control arms with a Chevy 12 bolt. Would like to confirm distances for both front and back bolt holes. Appears to be approx. 38" span for front bolt holes and 40" for the rear. Purchased a solid 1964-72 aftermarket rear sway bar and it doesn't fit (38 1/4" front and 40 5/8" rear). Trying to verify if it's an issue with the car setup or the bar. Thanks in advance!

 

My 66 measures 38 3/8 front and 40 3/4 rear. With my distance your swaybar and one 1/16 shim on each side and it's a perfect fit.

 

Thanks for the response and info.