So far/ Yet will not be a factor. There will not be any misalignment under the dash and touching is not a problem with steel braided type hose over the wires that dont really touch but are close to. I dont forsee any problems now or ever with this. It took a while to reinstall everything but its well worth it. Put steel braided hose around the wires to prevent touching the O2 sensor and wallah!!!! Heat!
Yes, you have it shielded and I understand that you have not had issues. I have seen others with the same, but the reason
I would not have it touching, nor reccamend it, is that the engine moves around and COULD damage the wires, motor, or the O2S at some point. I don't know about you, but for me, stuff like that happens at the WORST time.
The engine will run without the O2S, and/or heater if the chafing were to cause a failure, but the car will run rich and might clog the cat. conv. and give very poor mileage until it is fixed, and it might be harder to change the sensor too (YES, they do FAIL!!). Also, anyone driving the a turbo Pinto on the street in cooler conditions should have the ability to de-frost the windshield.
BTW1: You have the T-3 turbo in that photo, and I think it is in a "better" location than the IHI from an 87/88. When I fitted it the IHI Connie's car it was much more of an issue.
BTW2: Congrats on your project. I always like to see more T/P's on the road.
Bill