Pinion angle help

[68400BIRD]

I know most GM cars have 3 degrees angling down at the back of the transmission. Like mentioned above 1-2 degrees angling up should put you in the ball park. I would just tack weld everything in place. Then send it home when the drive train is in the car.

[discipletwo]

Pinion angle is relivent to ride hight so you relly need to set it last with wheel tire combo and full weight of car I would drop engine tranny in and tack it up close to mock up and weld it out when your done. The degree of tilt back of the engine is also not relitive to the frame its relivent to the ground so if say it was 3 down as compared to the frame then with tall tires in rear it might only be 1 down. All and all what u want is your rear 1 degree down as compared to the front angle so u need the combo in car don't over think it if your angles are parallel with the rear down alittle one other thing your mounting locations for your bars are for adjusting ic which affects your anti squat line that's what will make a car hook or blow the tires off pinion shims ar made for your purpos. My advise is worry about ic and weight transfer first and weld your rear pads last. To set your angle