either one is prolly better then the pinto eng
but in all seriousness, the 3T should be your choice. lots of mods to choose from and many different "frankin motors" to build out of it.
a really good site for these engines is
http://www.toyota3tc.com/forum/index.php
the 20/2/2re engines were designed as a truck motor. load of low end grunt but kinda breathless come redline (4.5k)
i would base your choice on where on the tach you do most of your racing, is it low end or high end. maybe see if you can find somebody with a pickup or a celica and go for a test drive with a 2Xr