To the guts of the tanks tonight - fitting the Cadillac engines into M5 tanks.  Beefy things two per tank.  V8s of 148 gross engine hp per engine at 3200 rpm giving a maximum level road speed of 36mph.  Bet they really sounded smooth -  quite a jump up from the old Wallis style tractor engines and even the Continental engines that had come in by this time - and of course some Chrysler engines were also used in the war time tractors

John