I am new to the site and wanted to say Hey, I know that there are a few people on the site looking for ways to up the performance on a 2.5, Clay Smith cams makes performance camshafts for the 2.5. I currently am running a 264 duration [email protected] with a 480 lift in mine. Shes has some age on her now has a 4.0 throttle body with a spacer 24lb. Accel injectors and a msd 6a ignition and stailess proflo muffler on it. I will be doing a stainless header hopefully this summer. Runs pretty good for what she is. can get a healthy 2nd gear scratch I know its not a 4.0 but decent on pwr, the manual trans and 4.10s help. Its been a decade since I installed the cam but its avail in a 254 264 274 and 284 duration. I installed the cam straight up but will try advancing the cam with the next timing chain replacement shes pushing 180k and the cam has been in it since 40k.