On a stock 428 CJ, I like the Comp Cams 268H. Idles nice and low with good vacuum, works fine with the stock torque convertor, nice street manners and decent gas mileage. I had a 268H in my otherwise stock 69 Cobra Jet 69 Mach1, it ran 13.3 ET @102 MPH, leaving the shifter in Drive, shifting at 5400 RPM, with 3.50 gears, on 14" normal street radial tires. I have 2 new in the box 268H cams for $150.00 US, plus shipping. I also have 1 set of Comp hydraulic lifters for another $75.00, if interested.