Valve train geometry

yup
not a math whiz but know those who are or just insightful / mostly were unfortunately
Racer Brown, Dick Jones Barney Navarro
I used to try and set up rockers with a straight line through the pushrod ball, fulcrum, rocker tip/ stem or center of the roller at half lift but did play with others
If pattern was off side to side too much I'd move the shaft/ stud never tried (well once) centering the pattern
We had one of the first Mopar Max wedge 3 speed cars- then 4 speed - then torque flyte- (driver was not Ronnie Sox) had it tuned at Don Nicholson's Blair's Speed shop dyno- he always left it with too much advance but helped the low and mid range. Isky ground us a special .904 lifter cam which I see is no longer in the catalog- VERY consistent
we used it to dial in chassis for years Those early Max Wedge Heads had aluminum replaceable stands- later we milled the cast stands off and used the earlier ones
also made spacers, drilled the shafts off center, used larger hold down bolts in holes drilled off center, etc
get it right and valve train was much more stabil, = wish we had todays springs back then