3T

85mm x 78mm bore
pushrod hemi crossflow
1770cc; basically a 1.8L
ranged from 70-95hp

later spawned 3t-e, 3t-c and legendary 3t-gte (160hp in early/mid 80s)

3t stands for the T series, bore from above
3t-e, e stand for electronic fuel injection
3t-c, c stand for emissions package

g in toyota engine codes stood for wide 45 degree angle high performance head design (as opposed to f head design with 22 degree fuel economic design)