Hot tub

Any hot tub experts amongst us? I am replacing a motor and pump, and I cannot cross reference the parts.

I know I need the following:

220 v
3 hp
2 speed
48" frame
1.5" top inlet/center outlet

Should I be able to order from just that information, or do I need something else to consider? I would like to order through Amazon, but they are not going to be able to answer questions.