I'm sorry, we have two different threads going on about 1JZ-GTE vs 7M-GTE swaps going on right now and I missed some info pertaining to this specific thread.
1) I didn't realize this was a swap from a 7M-GE. Add a stronger fuel pump and oil cooling system.
2) Don't forget that you'll have to swap out the front subframe if your car is pre89.
3) With a $100 difference between the two I would personally go with the 1JZ. If the 7M were a few hundred less I wouldn't hesitate about going that route.
4) Parts are not as difficult to get as many seem to think. Those which aren't normally available can be sourced via certain shops such as DriftMotion or Canadian Toyota dealerships can order them (if your dealership claims they can't
).
You are setting your self up for more work with the 1JZ but not a ton given that it's a swap from a 7M-GE.
I still feel you should rebuild what ever you do go with.