Davids90toy said:
so how could i figure out which one works in my truck?
In theory, any of the antenna mounts will work for your truck... Some of them will look goofy though.
BajaTaco used a universal-fit mount (made by Firestik) very similar to this one: --->
http://www.walcottcb.com/product_info.php?cPath=293&products_id=311
Here's a photo of his installation, I don't think he'll mind if borrow the image for the sake of example... You may note that
BajaTaco had to shim the mount that he used because that portion of his truck's hood-channel curves downward. However, if you use the T100 mount, as recommended by
SAR_Squid79, you shouldn't have to shim the mount because it's designed for the curved hood-channel of the T100, which is similar to that of the other Toyotas.