The following SNPs are from the GRCh38 build

    1 158766655 158766655 C T
    1 162023402 162023402 T C
    1 169793666 169793666 T G
    1 6554475 6554475 G A
    3 179604597 179604597 A C
    4 39062542 39062542 A C
    5 177089630 177089630 G A
    8 142786489 142786489 C T
    8 142879785 142879785 C T
    10 86654812 86654812 C T

how can I map them to GRCh37 (where possible)?

Thanks
Use NCBI's [remap][1] or UCSC's [LiftOver][2].


  [1]: https://www.ncbi.nlm.nih.gov/genome/tools/remap
  [2]: https://genome.ucsc.edu/cgi-bin/hgLiftOver