I have a mercruiser 5.7 throttle body injection motor s/n OL618724 in a 2000 ebbtide I/O haven't been able to find out much info on the motor with that s/n my question is I'm wanting to do a tune up but not sure what Distributer cap and button to buy the ones I see that look like mine say with thunder bolt ignition and I don't think my motor has that. Does anyone have some part numbers for me that will work.