Is it possible install a Dev Edition ROM on a "common" Moto X?
That really doesn't make sense....but no. You can't.
There are SEVERAL XT1058s. Which do you have? The AT&T Variant, or a different one?
If you do NOT have the AT&T variant, you can already unlock the bootloader which basically "transforms" it into a DEV edition without doing anything else.
Any phone with an unlocked bootloader *IS* an un-official "DEV" edition. There is nothing "special" about the Dev editions except for their unlockable bootloaders, or rather the fact that they retain their warranty after being unlocked.
I'm not understanding what you intend to gain?
ALL Moto X's have unlockable bootloaders *EXCEPT* for the Verizon, AT&T, and Republic Wireless variants.
The only thing "special" about the dev editions is that they keep their warranty intact after unlocking the bootloader. But if it isn't a device SOLD as a DEV edition, you will void its warranty anyways.
And if you happen to have the AT&T, Verizon, or Republic Wireless variant, see the thread in General titled "China Middleman Back" - that guy sells codes that unlock the bootloader on the locked variants. If you pay him and get a code, your phone will be a non-official DEV edition. If you DON'T have AT&T, Verizon, or Republic Wireless variant, you can *already* unlock it *FREE* from Moto's official unlock website.