With the body level front to back and side to side,at rocker panels. What angle should the motor be set at for best performance? This measurement is from the top of the engine bolck not the intake.Should it sit level (parallel) with the car?

Engine should be centered side to side in the body,correct, if possible? At the rear the point where the drive shaft connects to the rear end this is usually off center ,correct? So its normal for the drive shaft to run at angle outward or is it best to have the drive shaft running straight down the center of the car and have the rear end offset? This set is for a High performance application not a daily driver. Thanks