In 1996, I ordered a Dakota extended cab with the automatic and 3.92 rear ratio with sur-grip. I was waiting for it to show up when the salesman called me. The truck bringing it to the dealership had been involved on a crash and the load was all damaged. My truck was on the top and ended up being about 3 feet tall. So, I know they were ordered and didn't cost all that much more, they just weren't often ordered.

 

Why OH FRICKEN WHY do I acquire a thing, and i ALWAYS FIND OUT LATER that it's the one oddball version that involves things being hard to find/fix/replace for it???

That's it, I'm going back to the tree of woe, dammit! lol

 

.
In 1979 A Chevy Impala was built. Fast forward several years and I got it. The transmission modulator went out on it. They built a blue million Chevy Impala/Caprice cars. Except this was one of a fleet of 200 built for sale to Iran with special transmissions for desert conditions. Because of the revolution, they didn't go overseas. The modulator was nearly impossible to replace. At least that's what the dealer said when I paid out the nose after waiting for a couple of weeks.

It happens.

 

Also, does anyone know the header bolt torque specs for my engine?

1998 3.9 liter v6 Magnum

I bought grade-a8 bolts and new exhaust header gaskets today, hopefully to swap them out myself soon once I have all the tech info I need on this.

 

https://www.yukongear.com/shop/yg-c8-25-390

https://www.justdifferentials.com/Ch....25-390-ng.htm

3.90 is 39 and 10; 3.92 is 47 and 12.

the 3.90 is a stronger gear set with bigger teeth; the 3.92 more expensive to make due to the tooth count. On the road, the difference between 3.90 and 3.92 is negligible for a 4wd.

There is no carrier break on the 8.25 or 9.25 to my knowledge