Merry Christmas!
It's hard to see words. A picture paints a thousand words. First step of fixing is describing the problem well. Let is see a POSING thermostat.

 

So I have two four runners when is a 94 3.0 liter automatic and the other is a 91 3.0 liter standard the motor's look almost identical except for the distributor will the distributor out of my 94 fit in my 91 and we'll all the other parts interchange I have a leak by my thermostat looks like it's coming out maybe the pump right there not sure exactly I can't pinpoint it what do I do also my crank pulley wobbles is this all water pump issues

 

Well best thing is to change the water pump on your 5.3 chevy motor.

But seriously can you give us a better detailed description of what your working with and exactly what your trying to address. Often times if you can take a pic with your smart phone then edit it to draw or circle the leak before you post it. We can probably give you some solid advice.

 

And please buy some periods

 

Buy a service manual, learn how to read, learn how to write, learn how to follow directions, learn how to problem solve. Achieve self reliance.

You will have to tear down the front of the engine following the steps in the service manual. At that point you will have answered all of these badly posed questions on your own. If not; report back here.

 

Here in California I run a 180 thermostat been working great truck has over 500,000 miles on it running a 180 thermostat for 25 years 22re 1990 pickup

 

What kind of bolts should you use? Should I use Martensitic stainless steel type 410, or Austenitic stainless type 302/304, 303, 305, or zinc or galvanized steel or aluminum bolts?

Thanks!
Zac