Finally "Silvers" build thread!! ('78 swb 2wd silverado)

[68 TT]

Originally Posted by Captkaos

12bolt truck axle is NOT the same as a 12bolt car. The pinion on the 12bolt truck is smaller. The 10 bolt is the same strength and it has a bigger/stronger pinion. It is not worth the effort to find a 12bolt, save your money and time and just upgrade the 10bolt. If you don't plan to drag race it every day with slicks on it you will be fine.

I agree. You can also upgrade the 10-bolt in your truck with the 30-spline posi carrier out of an 88-up truck making it nearly as strong as the car 12-bolt.

An 88-up truck rear axle swap may be the way to go for you as long as you can handle the minor extra width with your wheel offset. It brings the rear wheels out closer to alignment with the front. Glock35ipsc did the swap on Fred and it really helped the looks.