Well i dont have a late model mustang but still love to mod the 69'. I just took the car out for the first time since i upgraded the rear end and the brakes. I now have a new Currie rear with 3.73 and a detroit locker, and just upgraded to 4 piston discs all around. acceleration is like night and day, and i can stop on a dime. Gotta love new parts.
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1969 coupe- 302 Edelbrock 650 cfm, performer RPM intake, performer RPM heads, FPA long tube headers, 2.5 in. X-pipe, 3.73:1 Detroit Locker, T5z, Force 10 discs all around