[DeTomaso] Dot 3 or Dot 4 for clutch master cylinder? non or synthetic? Thank you!

1972 Pantera, stockReplacing clutch master cylinder.   Do you recomend Synthetic or non synthetic?   Dot 3 or Dot 4?    (BTW-Seems Dot 4 is all synthetic at local parts stores).  Thanks  1972 Pantera, stock Replacing clutch master cylinder. Do you recomend Synthetic or non synthetic? Dot 3 or Dot 4? (BTW-Seems Dot 4 is all synthetic at local parts stores). Thanks