Question: 66 - 67 A Body Beaumont Spring Perch

silver steak · Addicted!

Question: 66 - 67 A Body Beaumont Spring Perch

norontcan · Canadian Poncho Superstar!

66 and 67 A body frames have different sizes of upper spring perches. 66s use a spring that is tapered at the bottom and full width at the top. They use an insulator between the spring and perch. 67 springs are tapered both top and bottom and dont use an insulator

-- Edited by norontcan on Tuesday 26th of December 2023 11:59:28 AM

norontcan · Canadian Poncho Superstar!

Check a good Chevelle supplier site, itll illustrate the different spring shapes and only show an insulator for the 66

silver steak · Addicted!

Thanks Ted

Good feed back. I believe the 10 bolt was an original diff when I bought the car.

So , when I removed it to install the 12 bolt, there were no insulators, as you call them, and the springs are as you say tapered top and bottom

Peculiar though, I was under the impression that both the 66 and 67 a body differentials were identical. Obviously I was mis informed as you mentioned.

thanks for your comments.

Dale

norontcan · Canadian Poncho Superstar!

Believe the 66 and 67 rear differentials are the same - they interchange.
It's the springs and frames ( and insulator or lack of ) which are different between the 2 years. But the lower section of a 66 spring is the same as the lower section of a 67 spring. So mounting of the spring to the diff is the same.

4SPEED427 · A Poncho Legend!

norontcan wrote:
Believe the 66 and 67 rear differentials are the same - they interchange.
It's the springs and frames ( and insulator or lack of ) which are different between the 2 years. But the lower section of a 66 spring is the same as the lower section of a 67 spring. So mounting of the spring to the diff is the same.

Actually the bottom of a 66 A body spring and 67 A body spring is different. 66 has a flat pad, 67 has a convex cup. 66 uses a flat washer and a bolt/nut through the hole in the pad, 67 has no bottom bolt.