I have read lots on here about upgrading the cac. I would like to hear from those who have done this. I don't mind going the trouble of putting in a 2nd gen cac, but is it really necessary? Also how much power have you put through the stock 1st gen cooler? I won't be running more than 300hp and will be pulling a 10k trailer at times. One local speed shop says the stock one is good for 300 ponies and a remanufacturer of aftermarket coolers states that they are marginal at best?? My friend has a 93 with a 97 engine and is over 300hp. He took the stock cooler and had the ends changed to 3" and then ran 3" tubing for the rest of the system. Your thought and comments please! Shadrach