Recommendation for Starite-Max-E-Glas II pump replacement

Motor gave out on the pump after 15 years.  Looking to get a variable speed pump - any recommendations on which options that will help minimize any replumbing? Series P4E6 I belive but not sure

(old motor was 1.5 HP)

Unfortunately, we do not have a drop-in replacement for the Max-E-Glas II. All of the pumps, including variable speed, will require some plumbing. What is the service factor (SF) of your current motor? This specification should be on the motor label?