In terms of Dumbbell Pullovers I read once said that if you hold it by the head of the DB than it activates the Pecs/Torso and if you hold it by the hand grip than it activates the Lats... I seen a video of young Rich Gaspari in the 80s doing barbell pullovers and he did it by doing 1 rep pullover and 1 rep bench press back to back in that motion.. Looked good I think I'm actually gonna give that a try