can someone tell me which headers are best for a street driven 67 ss 396 4spd car?

Hedman 1.75" primaries and 3" collectors. Just put them in my 67 and they fit like a glove. Did have to cut a little bit off the bottom control arm mounts but no dings in the header tubes. You can get them coated from Hedman or uncoated. 68190 is the uncoated, 68196 is the coated version and 68198 is the Elite part # which is the heavy duty header.

That's the answer!