86 tire and lock questions

[STown]

Alright, I'm pretty sure I'm going to pick up a nice 1986 firebird for sale near me, and I'm new to this stuff, Whats my best bet for tires? The call will need some new ones soon, I'm wondering what I should look for?
It's a 305, 3speed automatic I'm just wondering how I can go about looking for tires? What people put on theres, etc,
Also, the drivers side door needs a new lock, because it doesnt lock, what do you guys find best for buying older parts? I have a buddy that says I should look into finding one off a old firebird, or in fact just an old pontiac of the same year, or around there,
Any help is greatly appreciated,
and yes im new to all this, thanks.

[GTP Dad]

As far as the tires go, go to tirerack.com and search for tires that will fit your driving style. As for the lock, it may be difficult to find a door that is in good shape. You should be able to find a new lock at a parts store or from the dealer that will fit properly and shouldn't cost a whole lot.

Welcome to AF!