will 05-06 mustang wheels fit my 67 coupe?

 

The bolt holes will line up. Offset will be a problem since your '67 likes a centerline wheel.

 

any idea on what size wheel spacers i would need?

 

American Racing makes some Torque Thrust wheels that look similar, but will be made with the right offset.

I don't know the offset of the new rims, but it'd be more than an inch and wouldn't be a very safe bet to use the spacers that thick.

 

1 1/4 in the front and probably an inch in the rear(u can use a 1/2 in the rear on the99-04) so id go with the 1" to be safe