I found a set of used ford racing 4:10s with about 500 miles on them for 100 bucks!!! The new computer is in and the car is running great!!! I also did nkg tr55s platinum plugs. I got 20 miles more out of the first tank of gas so I'm pleased!! I didn't reinstall the diablo chip because i wanted to see how the car ran without it. I must admit it feels faster. It pulls harder in the upper rpm range. After the 4:10s are installed i need a tune. Can an old school delta chip be reprogrammed or should i gust save up for a predator??? Also, with the new computer I haven't received a check engine light and I do not have cats. As always I know to come here for all the great information and advice!!!:thumbsup: