Pinion angle for a street cruiser

HemiDenny said
To eliminate vibration, it is important match the total amount of U-joint angles of the front u-joint and / rear u-joint

example....

1) differential angled DOWN 3.5 degrees MINUS (same angle) driveshaft DOWN 1.0 .................equals total 2.5 degrees

2) engine angled DOWN 1.5 degrees PLUS (opposite angle) driveshaft angled UP 1.0 degree......equals total 2.5 degrees

when the angles match, smooth as silk. stay away from a straight line / no angles

Thank you HemiDenny. Can you confirm what you mean by "differential angled DOWN". Does that mean the pinion center line is higher at the front or back? I think that's something that confused me on other posts I read. Is it accurate to say that in your example, it's a continuous down hill slope from the front of the crankshaft all the way to the pinion gear?