We never saw 18r-g or 2t-g style motors... as was suggested it was either 2TC/3TC or 20R/22R back then... too the 3AC,4AC; whatever it was the Tercel and Corolla had...
In racing, it's accepted as fact that if you're going to boost anything boost the 2T/3T motor. One doesn't see boosted 4A-G's in road course racing...