ofcourse go for 4efe,or 5efe as its more durable on Cng,4afe & rest are more moderate in racing world.u can check the diff below,
Toyota 4-EFE, 16 Valve
Displacement (cc): 1587CC
Bore: 74mm
Compression Ratio: 9:6:1
Cam Design: DOHC
Horsepower @ rpm 99 @ 6600
Torque ft lb @ rpm 117nm @ 4800
Valve Train: MPFI
Toyota 4-AFE, 16 Valve
Displacement (cc): 1587CC
Bore:
Compression Ratio:
Cam Design: DOHC
Horsepower @ rpm 113 @ 5800
Torque ft lb @ rpm 101nm @ 4800
Valve Train: MPFI
for verification u can see the piston block,(which comes after the head/tappats), just below it,besides the distributor,u can easili reconized the genertion, it will surli starts with 4e123 watso ever according to the engine code/number,