Now Im confused. I thought that early 2T's differs from later 2T and 3T heads. Toyota gives same part number for both 2T and 3T head (11101-29229 and substitute 11101-29228), so I dont think that theres differences. Of course 3T-C has drilled out EGR slots (11101-29278 and subs. 11101-29279). And 2T-B with higher CR (11101-29355 and subs. 11101-29356).
Rod, friend of mine have early 2T but it might be hard to persuade him to take intake (and exhaust?) manifold off cos it's daily driven. I faintly remember that I measured about 2 years ago that valves were something like 1mm smaller but I might be BS:ing so take that as a gospel till someone confirms this.