Ok I just bought a 4:11for my 1991 T/A i have a few questions what is the performence going to be like also I have a 1969 360 sbc built. also how is the car going to run on the freeway. 1 More question what is the stock gearing in a 1991 trans am.

Here is a link for my car on cardomain so u can see the engine.
http://www.cardomain.com/ride/2428070

 

welcome and check out the NW indiana board on the bottom of here in the regional section. I'm assuming you bought 4.10s for a 7.5" 10 bolt, they will wake the car up, RPMs can be figured out on a RPM calculator based on your trans. Check out google.com for a search for one. Furthermore I hope you have a big stall for these gears and have a rev happy motor with a single plane intake and DP carb on top.

 

Yea about the stall ii got a 3000 one sitting im garage right now should i drop that in and is it a good stall speed.