Per an Australian site:
http://www.turbosupras.com/pages/pages/specifications/MA70GA/ma70ga.htm
Intake Duration 200
Intake Camshaft lift 7.44mm
Intake Valve timing - Opening 6° BTDC
Intake Valve timing - Closing 50° ABDC
Exhaust Duration 201
Exhaust Camshaft lift 7.44mm
Exhaust Valve timing - Opening 53° BBDC
Exhaust Valve timing - Closing 3° ATDC
Note that there is no mention of what lift that these figures were taken at.
IMO, they are not 256 cams, as HKS made cams in both 248 & 256 (at zero lift).
I have seen figures around 240 at zero lift for the stock cams.