I dont know, I dont think I want to go higher then 3.90s thats alot of stress on the motor every day in addition to the gas, I am constantly driving in the 70-80 MPH range. Thats alot of revs every day to work. its almost 30 miles round trip daily.
with 3.90's at 80mph you will be at 2700rpm, 70mph at 2394 rpm. this is a link to the RPM calculator.It even gives you the option to check which tranny you have. wcfords.com/stuff/calcs/EGTcalc/egtcalc.php
Ok those numbers are acceptable to me. I think the 3.90s would be the way to go for me. As a side question, did my cobra come stock with sub-frames? I wasnt aware that they did but mine has them.
ahhh thats pretty cool, but I would have like some cross braces how do you guys deal with the wheel hop you get when you break the tires loose?