I've got 2 different 1.6L ,8V motors and the motor mount brackets are different sizes. They look interchangeable, yet one set will have the engine over an inch higher than the other. Does anyone know what the difference is for? I think one is a Sidekick 4x4 and the other a Tracker 4x2. Is the difference for front diff clearance or are they just because of different years (89 v 92)