What's the widest wheel/tire setup on stock 69 Firebird?

[69Ponti]

I'm looking to put in 19" wheels on my 1969 Firebird with Hotchkis lowerings springs and rear leafs. What is the widest wheel width and tire sizes I can fit on there without rubbing issues? Thanks for the replies.

[v8s only]

9.5 wheel 275 tire

[69Ponti]

What about the fronts? Thanks.

[v8s only]

stock sub frame 8 inch rim 245 tire