I parted out a couple of dozen '85-9 Diplomats/Grand Fury police package vehicles through the years. They all had 360 heads and intake. The '85-7 had flat tappet cams ( but also had the bosses for roller cam), the '88-9 had rollers. IIRC, they all had 998 transmissions, sure grip 10 bolt rears, dual exhaust and cats, and 100amp charging systems. All the other heavy duty police stuff too.