[phil400]

Originally Posted by PunchT37

Isn’t ‘78 an oddball year with 3.42’s instead of 77 or 79’s 3.23’s?

Are all the autos 2.41’s ?

Don't now about all autos, but in 78 the 4speed w72s got 3.42 and auto got 3.23, for 79 both got 3.23 like in 77.

[78MayanW87]

I wanted to follow up here... I ended up ordering the Quick Performance Eaton TrueTrac kit with QP 3.42 gears. I contacted QP and ordered over the phone rather than through the website and explained that I was specifically requesting Timken bearings rather than Koyo. I also requested a pinion set up bearing. QP was great to deal with and I received my package within about three days. Upon inspecting the contents of the package; however, what I had received was Koyo bearings, a "setup" bearing that hadn't been machined for set up and a Yukon Dura-Trac diff. The QP ring and pinion were correct, so there is that. I double checked the order that was in the package and it matched precisely with my phone order. Not sure what happened during the packaging process. I called QP and explained what I had received and they were suitably embarrassed. They reassured me that they would take care of this and apologized profusely. Within about three days I received another package with all the correct parts along with a packaging label to return the wrong parts. So, all in all, it wasn't the smoothest of transactions, but they were great to deal with and made things right as quickly as they possibly could. I would definitely do business with them again and wouldn't hesitate to recommend others to do so. Got everything set up with a perfect gear mesh pattern, pinion preload, ring/pinion backlash and combined ring/pinion preload. It took a bit of time but in the end, I was very happy with the set up. Just waiting on the Wilwood rear disc conversion kit to arrive to finish this up. I appreciate the input from all of you to help get me here. Lee