Here's a pic, Bill. Let me know if you're interested. $140 shipped to you.

https://photos.smugmug.com/SYc-Site/...33EA550-X2.jpg

Scuncio,
I have an 1: .833 also but mine has different part number 6477965. Do you happen to know why or the difference?

I did some research and mine is for a 1970 Nova with 4 Spd (Exc. Close Radio) and does the following:
Rear Axle Ratio - Rear Tire Size - Adapter, Speedo / 4.329
3.55 E70 x 14 6477965
3.55 F70 X 15 6477965
3.70 F70 X 15 6477965
4.11 F70 X 15 6477965

Scuncio,
I found a little info. on your part # and its for 1968, but it says to refer to chart in group 4.337 for additional model application. I don't have that chart....Dave

Bill,
That adapter I believe is for the following applications. Is that correct??
67 Camaro (4 Spd with P/Trac) 4:56 and 4:88 gear ratio
68 4 Spd Chevy, Chevelle, Camaro with 4:10 ratio with 7.35 x 14 tires, F70 x 14 tires
68 4 Spd Chevy, Chevelle, Camaro with 4.56 ratio with E70 x 14 tires
68 4 Spd Chevy, Chevelle, Camaro with 4.88 ratio with E70 x 14 tires, E70 x 15 tires
68 4 Spd Chevy, Chevelle, Camaro with 4.88 ratio with 7.35 x 14 tires, F70 x 14 tires

My car is a 68 Z/28 E70 X 15 with 4.88s. Should be the last gear and adapter combo in this chart.

I have 6476736 on my 68 L78 Camaro with 4.10s so I can confirm that application.

I've got a couple not really sure what they are. Just took them off a 71 M21 and a 72 M20. Here is a couple photos. Larry

If you want to sell the .8241 I am interested.

I have a 1:.866 part # 565210, 6451930,6451929,6451928,and 584278 also 2 .777 to .500 1 .777 to .7333