Most measurements are real close
These were just quick measurements I had scribbled down on a paper a while back for S&Gs
Standard issue Chinese SKS:
front sight width .433
cleaning rod holder width .390
barrel dia. .551
frt. sight base to muzzle .485
collar diameter behind front sight .622
Czech Vz58:
front sight width .462
bayonet lug width .468
threaded barrel diameter .538
frt. sight base to muzzle end .523
frt sight barrel collar(its tapered) .672 front .685 rear
barrel dia behind sight base .593
Chinese MAK90 (typically a heavier built weapon than European counter parts)
front sight width .463
barrel dia .552
frt sight barrel collar dia. .752
front sight base to muzzle end .574
barrel dia behind front sight .617
No lug or cleaning rod
What else did I learn, well a MAK 90 and a press fit Chinese SKS possibly share the same barrel, the AK being shorter of course, A story for another day