Everything on the engine itself is identical on the 2wd, save for the oil pan and oil pickup tube.
The only other differences are between the RE (EFI) and R (Carb'd) verions.
Hope this helps,
Todd

1986 Pickup extracab longbed "Woody edition"
SAS - 33's, 5.29's, lockright rear.

02 IS300 SportCross - my "DD"
94 2wd v6 extracab
04 Outback Wagon- wife's/family car