I just got a 4.6L interceptor police car engine. I wanted to see if they can be used for a small 18 ft jet boat. I see the 5.3L gm being used. Has anyone tried this or can help if it would work. I have a limited supply of 15 engines with transmissions. I have computer and harness. The one I have has 21k miles on it . others vary from 50-110k .