You should jump on that 1jz swap. (Obviously inspect the motor/tranny)
You'd literally be getting a free motor since the r154 prices have skyrocketed.
1jz's in a schassis is more than enough power to have fun with.
Since you live in the states and want to keep the car "reliable" I'd def go with the 1jz. Parts will be easily accessible. (This is coming from an RB fan)