I, for one, say go for it...
As said before... you never know if you'll have a chance like this again... in this line of work, we are all too familiar with the fact that "tomorrow isn't promised to us"...
Now don't get me wrong... I'm not sayin run up to him and give him a big hug and a wet kiss on the cheek... Meet the man, get to know him just like somebody you met on the street... see who he is... if he's somebody you want in your life... worst case, you walk away being able to put a face to the name "Dad"... We only get 2 parents, why write one off without giving him chance to atleast be "a friend"???
Just remember...
Don't loan him large amounts of money...
Don't loan him your car...
Don't give him your house key...
At least till you really know the type of man he is... Basically, be wary but, don't pass it up...