That's Yamaha's car right there. Pretty lil thang! Every great high revving engine in a Toyota has had Yamaha involved with the top end.
3M (in that car), 4A, 3S, 1JZ, 2ZZ. I don't THINK they worked on the 2JZ per se, but the 2JZ is a bigger 1JZ.
Funny enough, the 1JZ head is supposed to make better power on the 2JZ than the stock 2JZ head. I don't think it's to do with the 1JZ having a better head, but how air flow changes the torque curve. I know the 22R hybrid was a popular creation. 2.2L 20R head on the 2.4L 1981-1984 22R bottom end was a direct swap. Apparently it made great power but none of us carburetor tweaking, paperclip unbending knuckle draggers could put finger on it.
I actually used to own a SHO. I loved that thing! Talk about a sleeper.. Of course I had 2 large pipes coming out the back that was not subtle but man that car ripped for its time and look.. I cant tell you how many double takes I would see from people when I started it up. Not to mention all the feelings I used to hurt on the highway with grandmas car.