I wouldn't be worried about 60 knock at 6000rpm either.
"i plan to baby the car for the next two years and save $ for a new engine". Good idea to plan for a rebuild.
Read up on the well documented oil starvation issue caused by the short nose crank, crank collar, OEM oil pump and subsequent failure of Big end bearing/s.
- Pre late 93 model R32 GTR's
This post is not meant to cause you undue concern, but rather give you information so that your aware, if not already aware.
Edit:
my compression test came back at 154 to 155 across all 6 prior to when I bought my 92 GTR in 2004 at 104,000kms.
Oil starvation and big end bearing failure within the first few months of ownership. I wasn't aware of this Achilles heel at the time.
Oil pressure gave no indication prior to failure.