switching to Warn lock out hubs

[56hotrodred]

I am building a 73 4x4 - 4 speed with one of my boys and want to put Warn hubs on the front in order to be able to unlock the front end and maybe increase fuel mileage a bit.

After doing a search I also saw mention of doing something to the transfer case. Is that also needed?

As you can tell from my signature I usually hang out elsewhere but have been lurking here for a while trying to learn as much as I can from you guys.

Thanks in advance or any help.

56hotrodred