Ok, I located the good quality stone I carved some notes into....(but let's not forget this is only base semantics we're dealing with here, and unlikely to solve anything except our collective curiousities)
Carving says;
357 'Lift' ; 0.3455"/ 0.3515"/0.350" / 0.3455" (Must be ground cam in use- no base circle size here)
'New' 357 Base Circle dia; 0.951"/ 0.951"/ 0.949" / 0.951" (4 lobes L-> R)
'Old' ? 356 Base Circle dia; 0.8985" / 0.897 / 0.894" / 0.884" (must be an old one I'd forgotten about)
** note fairly rudimentary measurements
If I recall most of my adjuster are also wound in far and varied, but Ally head so different game, but have the concerns that Chaterlea John mentioned of geometry, which is why I asked GB for pushrod length measurements (I replaced mine with 'Dural' rods but can't locate the slate I scribbled those measurements into...tin roof rules that out
)
I took a bunch of photos to figure it all out, but analyzing two pics/valve (Open/Closed) sent my brain into a spin....