35" Tire on Stock 16x7" Rim

Have searched the forum and could not find an answer here. I have found, using our friend Google, that people have successfully put 35" tires on the stock 16x7 wheel. But that was not on a Tacoma.
I have a kind of long term project to go to 35" tires. The four 315/70/r17 tires that will go on the driving wheels will go on 17x9" rims. But I'd like to save a little money and keep the stock spare wheel/rim and put a (used) 35" tire on it. I've heard putting a 35" on a 7" wide rim is called a "poor man's bead lock" which seems to me that it can work. I'm not trying to get a cheap bead lock. Just a spare that will get the job done if I need to use it.
Anyone here done this?

Thanks!

 

Make sure the tire is rated for the wheel width, it’s in the specs. Running on a smaller than rated will work and likely help keep the bead seated at lower pressures, but you also are more likely to damage a sidewall if the tire is too wide for the rim.

 

I was told it can be done but it's not recommended because when you air down they're more likely to pop a bead.