What rear shock angles to run?

Finished Moving leaf springs inboard 3 inches and rear end back 1.5 and now we're getting ready to fab up the shock mounts. I already ordered hotchkis fox non adjustables and was Trying to figure out if I should try to keep the shocks close to a factory angle or not. Maybe less of an angle to compensate for more body roll with leafs moved in? Also wondering if anyone knows what the factory angle is at right height and if there is any angle in the shock from front to rear. All going in a 72 dart built for street use. Thanks.