Best of luck with the project. I personally love the shape of this car, and the choice of engine is absolutely top class.
Let me add to some of the discussion that has been going on.
When you go about putting a powerplant as potent as a 2JZ in a car like a 70s Cressida, you must realise that it is a HUGE change from the original specs of the car. This change necessitates a great deal of attention being paid to the UNDERSIDE of the car (the chassis, structural strength, rigidity, suspension, brakes, differentials, tie-rods, connecting rods, steering box, engine foundations, shaft alignment, axles and hubs). I partially agree with some of the comments in the thread, that you MUST pay far more attention to this aspect than denting and painting. Our mechanics will NOT pay attention to this on their own. Since hardly anyone sees under the belly of the car, they're more than happy to do shoddy work, cover up visible blemishes and say "baoo ji...bilkul fit aey". This does NOT mean "waqayee sab fit aey". You will have to pay very close attention to this aspect yourself.
This does not mean that it is not doable. It very much is, as long as your focus remains on making the car sound enough to take the power of the engine. I think you may not have removed the body from the frame, and have opted instead, to transplant the engine into the bay, dent and paint it, and bring it to 'finished form'. I would advise that BEFORE you DO paint the car, you test it for at least a couple of weeks to find out what problems the car might have. Remember: safety first, each and every time. A car that is painted pretty with a massively-powerful engine does not necessarily equate to a good car, or a safe car. You owe it to yourself, and the passengers who will be riding with you, to make sure that you don't compromise on some of the aspects that have been mentioned.
Once again, I wish you the best of luck in the project. Build safe...and drive safe, Insha Allah.