just want to get it right the first time. im notching my frame to the middle seam and rolling the inner wheel tub lip and outer quarter lip. whats the biggest rim and tire combo i can use? would like to have a 10inch contact patch on the tire if that helps and what backspacing would i need since im using stock rear end width wiht a QP 9inch rearend. this is on an 1980 regal with a 13.75:1 489bbc
