Check this thread to see how your MCA compares.
http://talk.collegeconfidential.com/cal-poly-san-luis-obispo/2060363-2018-final-status.html#latest
You are in the ball park, but this past admissions cycle SLO was unable to offer 10,000 4.0 GPA applicants a place at SLO so it will be a tough admit and much depends upon how you compare to your fellow applicants.
Definitely apply widely and make sure you have several safety schools on your list and work to bump up your MCA score.
http://www.sanluisobispo.com/news/local/education/article211776744.html