Any suggestions will be greatly appreciated.

While replacing the original throttle position sensor one of the screws broke off at the head.

Put throttle body in vise, soaked screw with PB Blaster, very carefully applied vise grips for about five minutes with very little rocking. Broke again with only about 3/16" left exposed this time.

So the question, can I apply a little propane heat to it?

 

Sorry about answering my own question. Heat worked fine. Screw is out.

 

alrighty then

 

Yep. The factory used some sort of cream colored stuff on the threads that makes it challenging to remove. It really glues them in. Found the same stuff on timing chain cover bolts last year that also required some propane heat after breaking a couple off.