I have had ok luck with the reproduction batteries. You do have to check the levels on them about once every couple of months. I neglected that on one battery and it died. Other than the one problem both batteries have lasted for several years without a problem. I am on my second one since 1999 on the 1966 GT350. The battery is almost always on the car, as I drive it usually once or twice a week. I even had the car out last night even though I have spent most of my car time recently on the 1969. I will be buying a battery for the 1969 soon. Just want to double check, the group 24 is the correct size for a 1969 GT 350? Please advise. Thanks Lee 66 # 869 69 # 2055