I would also point out that preclinical grades simply don't matter.
See page 13 of the NRMP program director survey results:
https://www.nrmp.org/wp-content/uploads/2021/11/2021-PD-Survey-Report-for-WWW.pdf
"Awards/honors in basic sciences" is near the bottom of their rankings for what they care about when deciding who to interview and how to rank applicants.
Whether you push yourself to honor preclinical classes or just aim for a pass, it makes no difference when you apply for residency. Your MSPE doesn't mention preclinical grades, the AOA selection process doesn't consider preclinical grades, and so on.
Preclinical grading system doesn't end up mattering much. Better to consider the research opportunities of a school, if they have a home program in your specialty of interest, quality of clinical sites, etc.