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**IronCanine** · 10-03-2022, 11:00 PM

Should be a letter code on the face (front) of the third member. You can then match that up with the year and find the ratio in a parts book. See link:

https://www.67-72chevytrucks.com/vbo...24&postcount=5

10-03-2022, 11:00 PM	#19
IronCanine I'm trying.... Join Date: Oct 2013 Location: Athens, GA Posts: 2,880	Re: Eaton NoSpin 4.10 chunk Should be a letter code on the face (front) of the third member. You can then match that up with the year and find the ratio in a parts book. See link: https://www.67-72chevytrucks.com/vbo...24&postcount=5 __________________ 1970 K20 Z62 https://67-72chevytrucks.com/vboard/...56#post9334756 1970 Blazer http://67-72chevytrucks.com/vboard/s...d.php?t=645076 1969 K10 SWB CST http://67-72chevytrucks.com/vboard/s...52#post8520352 1971 K20 Z84 https://67-72chevytrucks.com/vboard/...90#post9047290 1946 B.F. Avery Model A Tractor http://67-72chevytrucks.com/vboard/s...55#post8292555 "Sometimes I wonder if zander208 was even real..."