It's been a few years since I shot the P-6x7.
The 165mm-LS and 90mm-LS were good lenses, you should not be afraid to try them. When I did use them, they integrated and worked well with the P-6x7 using a hand held meter. It was a little more difficult with the meter prism, as after you determined the exposure, you had to reset the FP shutter to 1/30th and set the correct shutter speed on the lens' leaf shutter.
Originally posted by MJL ... the Pentax use focal plane shutter in the body but the V lenses use leaf shutter. That will require open up the Pentax shutter first, then fire the leaf shutter on the V lens every time to take a photo. Definitely not an easy operation for street photography.
Actually there is no easy way to do this, the only way to trigger the Hasselblad central shutter is to release the key at the back of the lens, which cannot be accessed when the len is mounted. Then you need a screw driver (or thin coin) to re-cock it. If you want to use the leaf shutters in the Hasselblad lenses, the best way is to get a V-body (which are relatively cheap now) or an H-body. But you will not get 6x7 format.