From what I have read 8 degrees is the ticket. I have not done ours yet do to the fact have it pulled it apart. Ran great but the timing was an issue and I found out why....nylon or teflon coating came off timing gears and there was a bit of slack. Never made a noise. Our jeep has 112,000+. At 76,000 I hope you wouldn't need new gears yet.
After you do all your work if you still question it, then you may take a look at your gears.