what series
#5
This is what I found for the jegs brand ones on their website, should be what you want.
p/n: 555-60008
GM 7.5" Ring & Pinion
3.42 Ratio
41-12 Teeth
For 3.08 Ratio and Numerically-Lower Carriers
p/n: 555-60008
GM 7.5" Ring & Pinion
3.42 Ratio
41-12 Teeth
For 3.08 Ratio and Numerically-Lower Carriers