What to set valve lash w/o cam card?

1975 was b 4 tight lash cams most likely
what's the lash now? should give you a clue
using rusty's method you will not hurt anything
staring of at 30 30 or .028 you could
what''s your compression?
engine been rebuilt? (1970 pistons)
recent timing chain?
70 is a good motor