The '69 SS350 (option Z27) did have hydraulic lifters, Quadrajet carb, 10.25 compression, dual exhaust. Standard transmission was HD Muncie 3 speed. Power front disc brakes and 12 bolt rear were standard. I think some SS's were found to have 10 bolt rears with a Powerglide option. A special hood with louvres was also standard unless it was a Pacecar replica.