The 67/6x7 has a rudimentary, but very capable TTL averaging meter. It meters to 1 second, after which you'll be relying on your razor sharp incident/multispot+AVG hand-held metering skills.
These cameras are getting on a bit now, particularly those that have seen a lot of active service. Problems noteworthy on used bodies include jamming mirror (not related to battery status), faulty shutter brake/damper, loss of timing accuracy (from having the shutter cocked for a prolonged period of time without shooting), worn/scratchy winding mechanism, skippy winding gears, damaged/inoperable shutter hang reset button (recessed on front left side), worn light seals and disintergrating TTL prism sealing foam.
Still, scooting around with a keen nose can still get you a specimen that commands a stand-up-and-gasp response — as mine did. The 67II shares similarities (and SMC Pentax lenses) and somewhat modernised, improved handling over the clunky, tank-like but inimitably Pentax feel of the 67. Remember that all these cameras have 120 film, so the mirror box is correspondingly large, ditto the whack and clack, hence the mirror-lock up function (which I consider a very wise feature, though not all bodies have it) that provides a degree of insurance.
I really thought I had bought a fairly average kit until the first few rolls came back shot with 55 f4 and 165 f4: those trannies on the lightbox were anything but "average"! The 90mm 2.8 lens is a bright, squat little affair that can be welcome if you freestyle the big 67 sans-tripod, as it is a third of the size of many other lenses and a great deal lighter. There are times when I'd like a mid-range lens like that, but I'm not fanatical about carrying yet more weight around!! APUG member SMBooth sometimes bushwalks with a non-metered 6x7 and 90mm lens and the results are impressive. Get whatever you want and take it for a spin. All said and done I don't think you'll be disappointed. Just a little weary from hauling the big gun about...