Just me I would remeasure & use horizontle as a baseline rather than engine/trans CL & you want minimal angles & as said for them to be opposite so for instance if the trans output shaft angle is 1.5 one way then you would want the pinion to be 1.5 the other way (parallel but in different planes) plus a bit more down from that cuz of the rise on accell, maybe 1-2 more depending on the app