Note that the VZ series V6 also comes in north-south in older 4-Runners, yes? And Prado? forgot now. But this motor has very different heads to the motor in the VZV20 Camry. This is the iron block motors. The 4Runner motor does not have a great reputation.
The 1MZ-FE is alloy block in MCV20 and MCV36 Camrys and the like.
I imagine oil pooling problems can easily be addressed if you have the thing apart on a engine stand, make a good edjucated inspection, and drill some holes.
If I had to do some crazy conversion like that, I would use a HiLux motor that was already north-south with the propper gearbox. Consider a late model HiLux 3RZ-FE motor (2.7 liter 4 cyl twincam) with turbo kit! They already come with W56 gearbox. Or the V6 that comes in a late model HiLux, although probably not cheap. Still cheaper than converting a Camry V6.
With the effort taken to convert a FWD motor, it maybe better to use a old 1UZ-FE V8.
