I have an 88 IROC with the stock rear-end. The rear-end is the 9-bolt posi-trac rear. I have 2.77 gears in it now, but I want to put a ratio around 3.42. Can I get gears for this rear end, I also need a new cover with a bolt, instead of that crappy rubber plug. Thanks

I've got ratios from 3.27 up to 4.10 for 9 bolts. New covers (girdles) are on the way soon.

To go from a 2.77 to a 3.45, you will need a series 3 carrier.

All the information is on my page at www.9bolt.com

Miles