Pickup gears in early gearbox?

[35fordtn]

In some 18- cases I’ve been unable to fit a 29 tooth cluster, and in some I have. It’s though getting the main drive gear in. If it’s the 022a or the 21c gear set you will need to use a later shift tower. If it’s the 67-7113 a 67-7017 gear set then you can use your original shift tower as that gear set used the early synchronizer.

If you have a 4.11 rear end id stay away from the 29 tooth set