RON very kool, dont know how i missed this topic,,your card board scoop sorta looks like a shelby scoop used on the 05-09 mustang and the ac cobra,, it looks great,,you may want to check out one of those as to not building one,,,

and yes tire fitment issues,,ill try posting a pic,,33 tall x 22 wide radials on stock early A wheel wells,, only have to deflate the tire if the car is high enough off the ground rear end hanging on the 4 link and shock,,the key is a rounded side wall tire,,,hoosiers and a few others have a rounded side wall like a dirt roundy round tire,,mickeys have a more squared off side wall making it harder to get a big tire on and off