High torque NA engine

what is the lightest high torque engine that could be installed in a MK3 without breaking new ground?

2TZ-FE 2.4L DOHC head
2RZ-FE 2.4L cast Fe block and DOHC Al head
3RZ-FE 2.7L cast Fe block and DOHC Al head
2AZ-FE 2.4L Al block with Fe liners and Al head
2TR-FE 2.7L DOHC head
1AR-FE 2.7L Al block and DOHC AL head
2AR-FE 2.5L Al block and DOHC AL head
2VZ-FE 2.5L Fe block
4VZ-FE 2.5L Fe block
4GR-FSE 2.5L Al block and DOHC AL head
5GR-FE 2.5L Al block and DOHC AL head
2MZ-FE 2.5L Al block and DOHC AL head