he's not building a hot rod........he's building a drag car.......yes if it were a street car I would zero everything but the rear...-2-3* on pinion...if it had a solid rear like in a dragster..it all would have to be zero...I'm assuming the rear suspension is a 4 link .. the car is going to launch forward and up..the rear of the chassis is going to rise...so where does it put the drive shaft angle?????