Lug pattern question

I was wanting to order some 20 inch rims and tires for my car, the tires are Pirelli Pzero 245/35/20.. would this be a problem for fitting in the wheel wells? the rims im looking at range from 20" x 8.5 " to 20" x 9.5"
also the lug pattern for a 1993 Tbird LX anyone know it?

the lug pattern is 5x4.25. Dont know if they would fit.

there's a small choice of rims available for the tbird. you'll most likely need some custom spacers if you do find some 20" rims in our bolt pattern.

.. would this be a problem for fitting in the wheel wells?
Sure, those tires will fit in the wheel wells.
Whether the wheels and/or tires will rub is dependent upon the backspacing / offset of the wheels.

Hey JR. what size and brand tires and wheels u have on your bird? im looking at a design very similar to those on your car...

Hey JR. what size and brand tires and wheels u have on your bird? im looking at a design very similar to those on your car...
Front tires - 245/45/18 Nitto555's
Rear tires - 255/45/18 Nitto555's
Wheels are Polo-776, 18"x7.5".

http://files.automotiveforums.com/gallery/watermark.php?file=/500/255139Fun_Ford00131-med.jpg (http://files.automotiveforums.com/gallery/showgallery.php?ppuser=255139)

and those would fit with no problems on a 93?

and those would fit with no problems on a 93?
My tire/wheel combo will fit on any stock '93-'97 Thunderbird/Cougar.
Ford had a different spindle design for the '89-'92s.

the car was manufactured in 9-92.. so would the rims still work or?