Mach 1 Club

i just  got car and I have few questions like ,what   Kind of known problems 
Is this a good motor to have in the mustang world?

Welcome to the club. A little more information needed to answer your question, what year, engine (69 had 5 engine options), transmission and other options.

 to the club!  Like Black Jade said, we'll need a little more information, so we can give you good answers. There were several different options as he pointed out. Got some Pics? We Like Pictures! 

 Enjoy the site. 

JTS