I recently got lucky and got a parts blazer (1989) with a 4.3 4x4 and its even got 3:42 gears in it. I'm pretty sure I need a front diff in mine due to a bearing noise. As far as I understand I can just swap in the 4x4 front diff and change the axle tube right? Whats involved in swapping the axle tube over when I get the diff out. Thanks Guys