I would like to suggest a rating system for judging the resolution of old film lenses for use on the New K-1. The new sensor is capable of resolving about 110 Line Pairs/mm. The very best 35mm color film could resolve about 50 lp/mm. Old film lenses generally exceeded the resolution capability of 35mm color film by a small margin; say 55-65 lp/mm - since there was little point in having lenses sharper than that - as that sharpness couldn't be seen in photographs.
My idea is pretty simple: take a picture made by a lens mounted on a K-1 in a Photoshop type editor and start blowing it up. As long as you can see new detail in the enlargement - continue. However when no new detail is appearing and things as a result start looking "soft" - stop and note the magnification percentage. That number becomes its K-1 rating. Good film lenses will have ratings in the 50% to 65% range.
To put this in perspective a 50% lens is capable of making a picture which will fill a 55" 4K screen with detail. Making a 20"x30" print from that picture would result in a print that one could bury one's nose in and be happy with its sharpness.
Here are a couple of (reduced resolution for the web) pictures taken with a Takumar F 70-210 f4.5-5.6 lens on a K-1 at f6.3. I rate this lens as a 50% K-1 lens.